--- title: They have no venom; they hunt by grabbing prey and wrapping it in th… — Big snakes: pythons, boas and anacondas, and how… · tree and pragmatics description: They have no venom; they hunt by grabbing prey and wrapping it in their coils, which is why they are called constrictors. Who acts: Pythons, coils. A sentence of the lesson «Big snakes: pythons, boas and anacondas, and how big they really get» of the biology course of Mova's primary school with its --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/biology/321-big-snakes-pythons-boas-and-anacondas-and-how-big-they-really-get/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/) / [Big snakes: pythons, boas and anaconda…](https://md.mova.elamur.ai/free/en/corpora/school/biology/321-big-snakes-pythons-boas-and-anacondas-and-how-big-they-really-get/) / 1 # Big snakes: pythons, boas and anacondas, and how big they really get, sentence 1 They have no venom; they hunt by grabbing prey and wrapping it in their coils, which is why they are called constrictors. **Who acts:** Pythons, coils · **What happens:** have, hunt, grab, wrap, be, call · **To what, where:** venom, prey, coils, Pythons · **Speech:** someone speaks here This is a sentence of the lesson «Big snakes: pythons, boas and anacondas, and how big they really get» 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, coils), what happens, when and where, as Mova's frames read it from the tree. ## The tree {#tree} ```conllu # sent_id = school:biology:321-big-snakes-pythons-boas-and-anacondas-and-how-big-they-really-get.lesson:1 # text = They have no venom; they hunt by grabbing prey and wrapping it in their coils, which is why they are called constrictors. # source = school lesson (ours) # course = biology # lesson = 321-big-snakes-pythons-boas-and-anacondas-and-how-big-they-really-get.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): R7-rel-agree ×1 1 They they PRON PRP Case=Nom|Number=Plur|Person=3|PronType=Prs 2 nsubj _ _ 2 have have VERB VBP Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin 0 root _ _ 3 no no DET DT PronType=Neg 4 det _ _ 4 venom venom NOUN NN Number=Sing 2 obj _ _ 5 ; ; PUNCT : _ 7 punct _ _ 6 they they PRON PRP Case=Nom|Number=Plur|Person=3|PronType=Prs 7 nsubj _ _ 7 hunt hunt VERB VBP Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin 2 parataxis _ Agree=R7-rel-agree|Haiku=2:conj 8 by by SCONJ IN _ 9 mark _ _ 9 grabbing grab VERB VBG Tense=Pres|VerbForm=Part 7 advcl _ _ 10 prey prey NOUN NN Number=Sing 9 obj _ _ 11 and and CCONJ CC _ 12 cc _ _ 12 wrapping wrap VERB VBG Tense=Pres|VerbForm=Part 9 conj _ _ 13 it it PRON PRP Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs 12 obj _ _ 14 in in ADP IN _ 16 case _ _ 15 their their PRON PRP$ Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs 16 nmod:poss _ _ 16 coils coil NOUN NNS Number=Plur 12 obl _ _ 17 , , PUNCT , _ 20 punct _ _ 18 which which PRON WDT PronType=Rel 20 nsubj _ _ 19 is be AUX VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 20 cop _ _ 20 why why ADV WRB PronType=Int 16 acl:relcl _ _ 21 they they PRON PRP Case=Nom|Number=Plur|Person=3|PronType=Prs 23 nsubj:pass _ _ 22 are be AUX VBP Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin 23 aux:pass _ _ 23 called call VERB VBN Tense=Past|VerbForm=Part|Voice=Pass 20 advcl _ _ 24 constrictors constrictor NOUN NNS Number=Plur 23 xcomp _ _ 25 . . PUNCT . _ 2 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 | **have** | present | Pythons *= python* | no venom | | | | | vn birth-28.2-1 «NP V NP»: agent=Agent venom=Patient | | 2 | **hunt** | present | Pythons *= python* | | | | | | vn hunt-35.1 «NP V»: agent=Agent | | 3 | **grab** | gerund | Pythons *= python* *not said here* | prey | | | | | vn steal-10.5-1 «NP V NP»: agent=Agent prey=Theme | | 4 | **wrap** | gerund | Pythons *= python* *not said here* | prey | | Pythons's coils | | | vn spray-9.7-1 «NP V NP PP.destination»: agent=Agent it=Theme in coil=Destination | | 5 | **is** | present | Pythons's coils | | | | | why *property* | tree rules | | 6 | **call** | present · passive | | Pythons *= python* | | | | | vn initiate\_communication-37.4.2-1 «NP V NP.recipient»: subject=Recipient | 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:321-big-snakes-pythons-boas-and-anacondas-and-how-big-they-really-get.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): 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: [Big snakes: pythons, boas and anaconda…, 0](https://md.mova.elamur.ai/free/en/corpora/school/biology/321-big-snakes-pythons-boas-and-anacondas-and-how-big-they-really-get/0/) - next →: [Big snakes: pythons, boas and anaconda…, 2](https://md.mova.elamur.ai/free/en/corpora/school/biology/321-big-snakes-pythons-boas-and-anacondas-and-how-big-they-really-get/2/) - ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/biology/321-big-snakes-pythons-boas-and-anacondas-and-how-big-they-really-get/)