--- title: Behind a cat's retina (the back lining of the eye that senses light)… — How real cats hunt: stalking, waiting and pouncing · tree and pragmatics description: Behind a cat's retina (the back lining of the eye that senses light) is a shiny layer called the tapetum that bounces light back through the eye for a second chance, which causes the eye-shine; people have no tapetum, so our eyes do not shine green; road «cat's eyes» reflectors copy the idea. Who ac --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/biology/119-how-real-cats-hunt/9/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [Biology](https://md.mova.elamur.ai/free/en/corpora/school/biology/) / [How real cats hunt: stalking, waiting…](https://md.mova.elamur.ai/free/en/corpora/school/biology/119-how-real-cats-hunt/) / 9 # How real cats hunt: stalking, waiting and pouncing, sentence 9 Behind a cat's retina (the back lining of the eye that senses light) is a shiny layer called the tapetum that bounces light back through the eye for a second chance, which causes the eye-shine; people have no tapetum, so our eyes do not shine green; road «cat's eyes» reflectors copy the idea. **Who acts:** back lining, retina, shiny layer, tapetum, second chance, people · **What happens:** sense, be, call, bounce back, cause, have · **To what, where:** light, shiny layer, tapetum, eye, eye shine, idea · **Speech:** someone speaks here This is a sentence of the lesson «How real cats hunt: stalking, waiting and pouncing» of the biology course of Mova's primary school. The page gives its syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause: who acts (back lining, retina, shiny layer, tapetum), what happens, when and where, as Mova's frames read it from the tree. ## The tree {#tree} ```conllu # sent_id = school:biology:119-how-real-cats-hunt.lesson:9 # text = Behind a cat's retina (the back lining of the eye that senses light) is a shiny layer called the tapetum that bounces light back through the eye for a second chance, which causes the eye-shine; people have no tapetum, so our eyes do not shine green; road «cat's eyes» reflectors copy the idea. # source = school lesson (ours) # course = biology # lesson = 119-how-real-cats-hunt.lesson # annotation = Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R5-strong ×2, R6-punct-agree ×1, R7-rel-agree ×1, R8-pos-agree ×1 1 Behind behind ADP IN _ 5 case _ _ 2 a a DET DT Definite=Ind|PronType=Art 3 det _ _ 3 cat cat NOUN NN Number=Sing 5 nmod:poss _ _ 4 's 's PART POS _ 3 case _ _ 5 retina retina NOUN NN Number=Sing 20 nsubj _ _ 6 ( ( PUNCT -LRB- _ 9 punct _ _ 7 the the DET DT Definite=Def|PronType=Art 9 det _ _ 8 back back NOUN NN Number=Sing 9 compound _ _ 9 lining lining NOUN NN Number=Sing 5 appos _ _ 10 of of ADP IN _ 12 case _ _ 11 the the DET DT Definite=Def|PronType=Art 12 det _ _ 12 eye eye NOUN NN Number=Sing 9 nmod _ _ 13 that that PRON WDT PronType=Rel 14 nsubj _ _ 14 senses sense VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 9 acl:relcl _ _ 15 light light NOUN NN Number=Sing 14 obj _ _ 16 ) ) PUNCT -RRB- _ 9 punct _ _ 17 is be AUX VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 20 cop _ _ 18 a a DET DT Definite=Ind|PronType=Art 20 det _ _ 19 shiny shiny ADJ JJ Degree=Pos 20 amod _ _ 20 layer layer NOUN NN Number=Sing 0 root _ _ 21 called call VERB VBN Tense=Past|VerbForm=Part|Voice=Pass 20 acl _ _ 22 the the DET DT Definite=Def|PronType=Art 23 det _ _ 23 tapetum tapetum NOUN NN Number=Sing 21 obj _ _ 24 that that PRON WDT PronType=Rel 25 nsubj _ _ 25 bounces bounce VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 23 acl:relcl _ _ 26 light light NOUN NN Number=Sing 25 obj _ _ 27 back back ADV RB _ 25 advmod _ Agree=R5-strong|Haiku=26:advmod 28 through through ADP IN _ 30 case _ _ 29 the the DET DT Definite=Def|PronType=Art 30 det _ _ 30 eye eye NOUN NN Number=Sing 25 obl _ _ 31 for for ADP IN _ 34 case _ _ 32 a a DET DT Definite=Ind|PronType=Art 34 det _ _ 33 second second ADJ JJ Degree=Pos|NumForm=Word|NumType=Ord 34 amod _ _ 34 chance chance NOUN NN Number=Sing 25 obl _ Agree=R5-strong|Haiku=30:nmod 35 , , PUNCT , _ 37 punct _ _ 36 which which PRON WDT PronType=Rel 37 nsubj _ _ 37 causes cause VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 34 acl:relcl _ _ 38 the the DET DT Definite=Def|PronType=Art 41 det _ _ 39 eye eye NOUN NN Number=Sing 41 compound _ _ 40 - - PUNCT HYPH _ 39 punct _ _ 41 shine shine NOUN NN Number=Sing 37 obj _ _ 42 ; ; PUNCT : _ 44 punct _ _ 43 people people NOUN NNS Number=Plur 44 nsubj _ _ 44 have have VERB VBP Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin 25 conj _ _ 45 no no DET DT PronType=Neg 46 det _ _ 46 tapetum tapetum NOUN NN Number=Sing 44 obj _ _ 47 , , PUNCT , _ 53 punct _ _ 48 so so ADV RB _ 53 advmod _ _ 49 our our PRON PRP$ Case=Gen|Number=Plur|Person=1|Poss=Yes|PronType=Prs 50 nmod:poss _ _ 50 eyes eye NOUN NNS Number=Plur 53 nsubj _ _ 51 do do AUX VBP Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin 53 aux _ _ 52 not not PART RB Polarity=Neg 53 advmod _ _ 53 shine shine VERB VB VerbForm=Inf 44 advcl _ _ 54 green green ADJ JJ Degree=Pos 53 xcomp _ _ 55 ; ; PUNCT : _ 56 punct _ _ 56 road road NOUN NN Number=Sing 62 compound _ _ 57 « « PUNCT `` _ 60 punct _ Agree=R8-pos-agree|Haiku=60:punct|HaikuPos=PUNCT:,:_ 58 cat cat NOUN NN Number=Sing 60 nmod:poss _ _ 59 's 's PART POS _ 58 case _ _ 60 eyes eye NOUN NNS Number=Plur 62 compound _ Agree=R7-rel-agree|Haiku=62:appos 61 » » PUNCT '' _ 60 punct _ Agree=R6-punct-agree|Haiku=63:punct|HaikuPos=PUNCT:,:_ 62 reflectors reflector NOUN NNS Number=Plur 63 nsubj _ _ 63 copy copy VERB VBP Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin 21 parataxis _ _ 64 the the DET DT Definite=Def|PronType=Art 65 det _ _ 65 idea idea NOUN NN Number=Sing 63 obj _ _ 66 . . PUNCT . _ 21 punct _ _ ``` ## Pragmatics {#pragmatics} No stored speech act for this sentence. | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **sense** | present | the back lining of the eye | light | | | | | vn see-30.1-1 «NP V S»: agent=Experiencer light=Stimulus | | 2 | **is a** | present | a cat's retina | a shiny layer | | | | | tree rules | | 3 | **call** *speech: assert* | participle | a shiny layer *not said here* | the tapetum | | | | | vn initiate\_communication-37.4.2-1 «NP V NP.recipient»: agent=Agent tapetum=Recipient | | 4 | **bounce back** | present | the tapetum | light | | the eye | | for a second chance | vn run-51.3.2-2 «NP V NP PP.trajectory»: agent=Agent light=Theme through eye=Trajectory | | 5 | **cause** | present | a second chance | the eye shine | | | | | vn engender-27.1-1 «NP V NP»: agent=Precondition shine=Patient | | 6 | **have** | present | people | no tapetum | | | | | vn birth-28.2-1 «NP V NP»: agent=Agent tapetum=Patient | | 7 | **not** **shine** | present · do-support | our eyes | | | | | green *property* | vn light\_emission-43.1 «NP V»: agent=Theme | | 8 | **copy** | present | road eyes reflectors | the idea | | | | | vn scribble-25.2 «NP V NP»: agent=Agent idea=Theme | One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree. **Licence: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)**, as the whole of Mova corpus 0.4, of which this treebank (the agreed school, `mova-school-agreed-en.conllu`) is part. The lessons were written for Mova's primary school. Sentence `school:biology:119-how-real-cats-hunt.lesson:9`. **The tree:** Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R5-strong ×2, R6-punct-agree ×1, R7-rel-agree ×1, R8-pos-agree ×1. **The frames** are read from the tree by Mova's frames reader (`prag`) when this page is built, the lesson read in order, so a pronoun may be resolved from an earlier sentence. See the [release 0.4](https://md.mova.elamur.ai/free/en/releases/0.4/). - ← previous: [How real cats hunt: stalking, waiting…, 8](https://md.mova.elamur.ai/free/en/corpora/school/biology/119-how-real-cats-hunt/8/) - next →: [How real cats hunt: stalking, waiting…, 10](https://md.mova.elamur.ai/free/en/corpora/school/biology/119-how-real-cats-hunt/10/) - ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/biology/119-how-real-cats-hunt/)