--- title: When a perching bird bends its legs, tendons pull its toes tight rou… — Birds: feathers, wings, eggs and flight · tree and pragmatics description: When a perching bird bends its legs, tendons pull its toes tight round the branch, so it can sleep without falling off. Who acts: perching bird, tendons, km. A sentence of the lesson «Birds: feathers, wings, eggs and flight» of the biology course of Mova's primary school with its dependency tree and --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/biology/33-birds-feathers-wings-eggs-and-flight/15/) [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/) / [Birds: feathers, wings, eggs and flight](https://md.mova.elamur.ai/free/en/corpora/school/biology/33-birds-feathers-wings-eggs-and-flight/) / 15 # Birds: feathers, wings, eggs and flight, sentence 15 When a perching bird bends its legs, tendons pull its toes tight round the branch, so it can sleep without falling off. **Who acts:** perching bird, tendons, km · **What happens:** perch, bend, pull, sleep, fall off · **To what, where:** legs, toes This is a sentence of the lesson «Birds: feathers, wings, eggs and flight» 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 (perching bird, tendons, km), what happens, when and where, as Mova's frames read it from the tree. ## The tree {#tree} ```conllu # sent_id = school:biology:033-birds-feathers-wings-eggs-and-flight.lesson:15 # text = When a perching bird bends its legs, tendons pull its toes tight round the branch, so it can sleep without falling off. # source = school lesson (ours) # course = biology # lesson = 033-birds-feathers-wings-eggs-and-flight.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 1 When when SCONJ WRB _ 5 mark _ _ 2 a a DET DT Definite=Ind|PronType=Art 4 det _ _ 3 perching perch VERB VBG VerbForm=Ger 4 amod _ _ 4 bird bird NOUN NN Number=Sing 5 nsubj _ _ 5 bends bend VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 10 advcl _ _ 6 its its PRON PRP$ Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs 7 nmod:poss _ _ 7 legs leg NOUN NNS Number=Plur 5 obj _ _ 8 , , PUNCT , _ 9 punct _ _ 9 tendons tendon NOUN NNS Number=Plur 10 nsubj _ _ 10 pull pull VERB VBP Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin 0 root _ _ 11 its its PRON PRP$ Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs 12 nmod:poss _ _ 12 toes toe NOUN NNS Number=Plur 10 obj _ _ 13 tight tight ADV RB _ 10 advmod _ Agree=R5-strong|Haiku=12:amod|HaikuPos=ADJ:JJ:Degree=Pos 14 round round ADP IN _ 16 case _ _ 15 the the DET DT Definite=Def|PronType=Art 16 det _ _ 16 branch branch NOUN NN Number=Sing 10 obl _ _ 17 , , PUNCT , _ 21 punct _ _ 18 so so SCONJ IN _ 21 mark _ _ 19 it it PRON PRP Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs 21 nsubj _ _ 20 can can AUX MD VerbForm=Fin 21 aux _ _ 21 sleep sleep VERB VB VerbForm=Inf 10 conj _ _ 22 without without SCONJ IN _ 23 mark _ _ 23 falling fall VERB VBG Tense=Pres|VerbForm=Part 21 advcl _ _ 24 off off ADP RP _ 23 compound:prt _ _ 25 . . PUNCT . _ 10 punct _ _ ``` ## Pragmatics {#pragmatics} No stored speech act for this sentence. | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **perch** | gerund | | | | | | | vn assuming\_position-50 «NP V»: agent=Agent | | 2 | **bend** | present | a perching bird | km's legs | | | | | vn knead-26.5 «NP V NP.material»: agent=Agent leg=Material | | 3 | **pull** | present | tendons | km's toes | | | | round the branch; tight *property* | vn push-12-1 «NP V NP»: agent=Agent toe=Theme | | 4 | **sleep** | can | km | | | | | | vn snooze-40.4-1 «NP V»: agent=Agent | | 5 | **fall off** | gerund | km *not said here* | | | | | | vn calibratable\_cos-45.6.1-1 «NP.attribute V»: agent=Attribute | 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:033-birds-feathers-wings-eggs-and-flight.lesson:15`. **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. **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: [Birds: feathers, wings, eggs and flight, 14](https://md.mova.elamur.ai/free/en/corpora/school/biology/33-birds-feathers-wings-eggs-and-flight/14/) - next →: [Birds: feathers, wings, eggs and flight, 16](https://md.mova.elamur.ai/free/en/corpora/school/biology/33-birds-feathers-wings-eggs-and-flight/16/) - ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/biology/33-birds-feathers-wings-eggs-and-flight/)