--- title: Watch one walk across a station floor: its head seems to jerk back a… — Pigeons: head bobbing, homing and city cliffs · tree and pragmatics description: Watch one walk across a station floor: its head seems to jerk back and forth, but really the head stays perfectly still for a moment while the body catches up, so the bird can see the world without blur. Who acts: you, one, head, body. A sentence of the lesson «Pigeons: head bobbing, homing and city --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/biology/221-pigeons-head-bobbing-homing-and-city-cliffs/1/) [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/) / [Pigeons: head bobbing, homing and city…](https://md.mova.elamur.ai/free/en/corpora/school/biology/221-pigeons-head-bobbing-homing-and-city-cliffs/) / 1 # Pigeons: head bobbing, homing and city cliffs, sentence 1 Watch one walk across a station floor: its head seems to jerk back and forth, but really the head stays perfectly still for a moment while the body catches up, so the bird can see the world without blur. **Who acts:** you, one, head, body, bird · **What happens:** watch, walk, seem, jerk, stay, catch up · **To what, where:** one, station floor, world This is a sentence of the lesson «Pigeons: head bobbing, homing and city cliffs» 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 (you, one, head, body), what happens, when and where, as Mova's frames read it from the tree. ## The tree {#tree} ```conllu # sent_id = school:biology:221-pigeons-head-bobbing-homing-and-city-cliffs.lesson:1 # text = Watch one walk across a station floor: its head seems to jerk back and forth, but really the head stays perfectly still for a moment while the body catches up, so the bird can see the world without blur. # source = school lesson (ours) # course = biology # lesson = 221-pigeons-head-bobbing-homing-and-city-cliffs.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 ×1, R7-rel-agree ×1 1 Watch watch VERB VB Mood=Imp|VerbForm=Fin 0 root _ _ 2 one one NUM CD NumForm=Word|NumType=Card 1 obj _ _ 3 walk walk VERB VB VerbForm=Inf 1 xcomp _ _ 4 across across ADP IN _ 7 case _ _ 5 a a DET DT Definite=Ind|PronType=Art 7 det _ _ 6 station station NOUN NN Number=Sing 7 compound _ _ 7 floor floor NOUN NN Number=Sing 3 obl _ _ 8 : : PUNCT : _ 1 punct _ _ 9 its its PRON PRP$ Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs 10 nmod:poss _ _ 10 head head NOUN NN Number=Sing 11 nsubj _ _ 11 seems seem VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 1 parataxis _ Agree=R7-rel-agree|Haiku=1:conj 12 to to PART TO _ 13 mark _ _ 13 jerk jerk VERB VB VerbForm=Inf 11 xcomp _ _ 14 back back ADV RB _ 13 advmod _ _ 15 and and CCONJ CC _ 16 cc _ _ 16 forth forth ADV RB _ 14 conj _ _ 17 , , PUNCT , _ 22 punct _ _ 18 but but CCONJ CC _ 22 cc _ _ 19 really really ADV RB _ 22 advmod _ Agree=R5-strong|Haiku=21:advmod 20 the the DET DT Definite=Def|PronType=Art 21 det _ _ 21 head head NOUN NN Number=Sing 22 nsubj _ _ 22 stays stay VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 11 conj _ _ 23 perfectly perfectly ADV RB _ 24 advmod _ _ 24 still still ADV RB _ 22 advmod _ _ 25 for for ADP IN _ 27 case _ _ 26 a a DET DT Definite=Ind|PronType=Art 27 det _ _ 27 moment moment NOUN NN Number=Sing 22 obl _ _ 28 while while SCONJ IN _ 31 mark _ _ 29 the the DET DT Definite=Def|PronType=Art 30 det _ _ 30 body body NOUN NN Number=Sing 31 nsubj _ _ 31 catches catch VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 22 advcl _ _ 32 up up ADP RP _ 31 compound:prt _ _ 33 , , PUNCT , _ 38 punct _ _ 34 so so ADV RB _ 38 advmod _ _ 35 the the DET DT Definite=Def|PronType=Art 36 det _ _ 36 bird bird NOUN NN Number=Sing 38 nsubj _ _ 37 can can AUX MD VerbForm=Fin 38 aux _ _ 38 see see VERB VB VerbForm=Inf 1 conj _ _ 39 the the DET DT Definite=Def|PronType=Art 40 det _ _ 40 world world NOUN NN Number=Sing 38 obj _ _ 41 without without ADP IN _ 42 case _ _ 42 blur blur NOUN NN Number=Sing 38 obl _ _ 43 . . PUNCT . _ 1 punct _ _ ``` ## Pragmatics {#pragmatics} No stored speech act for this sentence. | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **watch** | imperative | you *not said here* | one | | | | | tree rules | | 2 | **walk** | infinitive | one *not said here* | | | a station floor | | | vn run-51.3.2-2-1 «NP V PP.location»: agent=Theme across floor=Trajectory | | 3 | **seem** | present | floor's head | | | | | | vn seem-109-1-1-1 «NP V S\_INF»: agent=Theme clause=Attribute | | 4 | **jerk** | to-infinitive | floor's head *not said here* | | | | | | vn push-12-1 «NP V PP-Conative»: agent=Agent | | 5 | **stay** | present | the head | | | | still; moment | | vn exist-47.1 «NP V»: agent=Theme | | 6 | **catch up** | present | the body | | | | | | vn get-13.5.1 «NP V NP»: agent=Agent | | 7 | **see** | can | the bird | the world | | | | without blur | vn comprehend-87.2-1-1 «NP V NP»: agent=Experiencer world=Stimulus | 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:221-pigeons-head-bobbing-homing-and-city-cliffs.lesson:1`. **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 ×1, R7-rel-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: [Pigeons: head bobbing, homing and city…, 0](https://md.mova.elamur.ai/free/en/corpora/school/biology/221-pigeons-head-bobbing-homing-and-city-cliffs/0/) - next →: [Pigeons: head bobbing, homing and city…, 2](https://md.mova.elamur.ai/free/en/corpora/school/biology/221-pigeons-head-bobbing-homing-and-city-cliffs/2/) - ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/biology/221-pigeons-head-bobbing-homing-and-city-cliffs/)