--- title: Pythons and boas are constrictors that squeeze prey so its blood sto… — Snakes and lizards · tree and pragmatics description: Pythons and boas are constrictors that squeeze prey so its blood stops flowing, and the reticulated python, over 6 metres, is the longest snake. Who acts: Pythons, constrictors, blood, reticulated python. A sentence of the lesson «Snakes and lizards» of the biology course of Mova's primary school wi --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/biology/30-snakes-and-lizards/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/) / [Snakes and lizards](https://md.mova.elamur.ai/free/en/corpora/school/biology/30-snakes-and-lizards/) / 9 # Snakes and lizards, sentence 9 Pythons and boas are constrictors that squeeze prey so its blood stops flowing, and the reticulated python, over 6 metres, is the longest snake. **Who acts:** Pythons, constrictors, blood, reticulated python · **What happens:** be, squeeze, stop, flow, reticulate · **To what, where:** constrictors, prey, longest snake This is a sentence of the lesson «Snakes and lizards» 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 (Pythons, constrictors, blood, reticulated python), what happens, when and where, as Mova's frames read it from the tree. ## The tree {#tree} ```conllu # sent_id = school:biology:030-snakes-and-lizards.lesson:9 # text = Pythons and boas are constrictors that squeeze prey so its blood stops flowing, and the reticulated python, over 6 metres, is the longest snake. # source = school lesson (ours) # course = biology # lesson = 030-snakes-and-lizards.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): R6-punct-agree ×1, R7-rel-agree ×2 1 Pythons python NOUN NNS Number=Plur 5 nsubj _ _ 2 and and CCONJ CC _ 3 cc _ _ 3 boas boa NOUN NNS Number=Plur 1 conj _ _ 4 are be AUX VBP Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin 5 cop _ _ 5 constrictors constrictor NOUN NNS Number=Plur 0 root _ _ 6 that that PRON WDT PronType=Rel 7 nsubj _ _ 7 squeeze squeeze VERB VBP Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin 5 acl:relcl _ _ 8 prey prey NOUN NN Number=Sing 7 obj _ _ 9 so so SCONJ IN _ 12 mark _ _ 10 its its PRON PRP$ Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs 11 nmod:poss _ _ 11 blood blood NOUN NN Number=Sing 12 nsubj _ _ 12 stops stop VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 7 advcl _ Agree=R7-rel-agree|Haiku=7:conj 13 flowing flow VERB VBG VerbForm=Ger 12 xcomp _ _ 14 , , PUNCT , _ 27 punct _ Agree=R6-punct-agree|Haiku=18:punct 15 and and CCONJ CC _ 27 cc _ _ 16 the the DET DT Definite=Def|PronType=Art 18 det _ _ 17 reticulated reticulate VERB VBN Tense=Past|VerbForm=Part|Voice=Pass 18 amod _ _ 18 python python NOUN NN Number=Sing 27 nsubj _ _ 19 , , PUNCT , _ 22 punct _ _ 20 over over ADV RB _ 21 advmod _ _ 21 6 6 NUM CD NumForm=Digit|NumType=Card 22 nummod _ _ 22 metres metre NOUN NNS Number=Plur 18 appos _ Agree=R7-rel-agree|Haiku=18:nmod:unmarked 23 , , PUNCT , _ 27 punct _ _ 24 is be AUX VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 27 cop _ _ 25 the the DET DT Definite=Def|PronType=Art 27 det _ _ 26 longest long ADJ JJS Degree=Sup 27 amod _ _ 27 snake snake NOUN NN Number=Sing 5 conj _ _ 28 . . PUNCT . _ 5 punct _ _ ``` ## Pragmatics {#pragmatics} - form: statement - act: assert - voice: narrator - polarity: none - teacher: kept the draft | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **is a** | present | Pythons and boas | constrictors and the longest snake | | | | | tree rules | | 2 | **squeeze** | present | constrictors and the longest snake | prey | | | | | vn push-12-1-1 «NP V NP»: agent=Agent prey=Theme | | 3 | **stop** | present | prey's blood | | | | | | vn stop-55.4-1-1 «NP V S\_ING»: agent=Affector clause=Eventuality | | 4 | **flow** | gerund | prey's blood *not said here* | | | | | | vn appear-48.1.1 «NP V»: agent=Theme | | 5 | **reticulate** | participle | | | | | | | tree rules | | 6 | **is a** | present | the reticulated python | the longest snake | | | | | tree rules | 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:030-snakes-and-lizards.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): R6-punct-agree ×1, R7-rel-agree ×2. **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: [Snakes and lizards, 8](https://md.mova.elamur.ai/free/en/corpora/school/biology/30-snakes-and-lizards/8/) - next →: [Snakes and lizards, 10](https://md.mova.elamur.ai/free/en/corpora/school/biology/30-snakes-and-lizards/10/) - ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/biology/30-snakes-and-lizards/)