---
title: Scientists once thought sauropods had to live in lakes to hold up th… — The long-necked giants: Diplodocus, Brachiosauru… · tree and pragmatics
description: Scientists once thought sauropods had to live in lakes to hold up their weight, but footprints and leg bones show they walked on dry land. Who acts: Scientists, sauropods, footprints. A sentence of the lesson «The long-necked giants: Diplodocus, Brachiosaurus, Argentinosaurus and Brontosaurus» of th
---

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# The long-necked giants: Diplodocus, Brachiosaurus, Argentinosaurus and Brontosaurus, sentence 11

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Scientists once thought sauropods had to live in lakes to hold up their weight, but footprints and leg bones show they walked on dry land.

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**Who acts:** Scientists, sauropods, footprints · **What happens:** think, have, live, hold up, show, walk · **To what, where:** lakes, weight, dry land · **Speech:** someone speaks here

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This is a sentence of the lesson «The long-necked giants: Diplodocus, Brachiosaurus, Argentinosaurus and Brontosaurus» 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 (Scientists, sauropods, footprints), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:266-the-long-necked-giants-sauropods.lesson:11
# text = Scientists once thought sauropods had to live in lakes to hold up their weight, but footprints and leg bones show they walked on dry land.
# source = school lesson (ours)
# course = biology
# lesson = 266-the-long-necked-giants-sauropods.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): no change
1	Scientists	scientist	NOUN	NNS	Number=Plur	3	nsubj	_	_
2	once	once	ADV	RB	NumForm=Word|NumType=Mult	3	advmod	_	_
3	thought	think	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	0	root	_	_
4	sauropods	sauropod	NOUN	NNS	Number=Plur	5	nsubj	_	_
5	had	have	VERB	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	3	ccomp	_	_
6	to	to	PART	TO	_	7	mark	_	_
7	live	live	VERB	VB	VerbForm=Inf	5	xcomp	_	_
8	in	in	ADP	IN	_	9	case	_	_
9	lakes	lake	NOUN	NNS	Number=Plur	7	obl	_	_
10	to	to	PART	TO	_	11	mark	_	_
11	hold	hold	VERB	VB	VerbForm=Inf	7	advcl	_	_
12	up	up	ADP	RP	_	11	compound:prt	_	_
13	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	14	nmod:poss	_	_
14	weight	weight	NOUN	NN	Number=Sing	11	obj	_	_
15	,	,	PUNCT	,	_	21	punct	_	_
16	but	but	CCONJ	CC	_	21	cc	_	_
17	footprints	footprint	NOUN	NNS	Number=Plur	21	nsubj	_	_
18	and	and	CCONJ	CC	_	20	cc	_	_
19	leg	leg	NOUN	NN	Number=Sing	20	compound	_	_
20	bones	bone	NOUN	NNS	Number=Plur	17	conj	_	_
21	show	show	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	3	conj	_	_
22	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	23	nsubj	_	_
23	walked	walk	VERB	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	21	ccomp	_	_
24	on	on	ADP	IN	_	26	case	_	_
25	dry	dry	ADJ	JJ	Degree=Pos	26	amod	_	_
26	land	land	NOUN	NN	Number=Sing	23	obl	_	_
27	.	.	PUNCT	.	_	3	punct	_	_
```

## Pragmatics {#pragmatics}

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- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: kept the draft

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **think** *speech: other* | past | Scientists |  |  |  |  | once *property* | vn consider-29.9-2 «NP V how S»: agent=Agent clause=Theme |
| 2 | **have** | past | sauropods |  |  |  |  |  | tree rules |
| 3 | **live** | to-infinitive | sauropods *not said here* |  |  | lakes |  |  | vn lodge-46 «NP V PP.location»: agent=Theme in lake=Location |
| 4 | **hold up** | to-infinitive | sauropods *not said here* | sauropods's weight |  |  |  |  | vn support-15.3-1 «NP V NP»: agent=Pivot weight=Theme |
| 5 | **show** | present | footprints and leg bones |  |  |  |  |  | vn transfer\_mesg-37.1.1-1-1 «NP V how S»: agent=Agent clause=Topic |
| 6 | **walk** | past | sauropods *= sauropod* |  |  | dry land |  |  | vn run-51.3.2-2-1 «NP V PP.location»: agent=Theme on land=Trajectory |

<!-- .note -->
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.

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**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:266-the-long-necked-giants-sauropods.lesson:11`.

**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): no change. **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/).

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