---
title: Identify the principal reason for which gold retains its lustre over… — Elements and the famous members of the… · tree and pragmatics
description: Identify the principal reason for which gold retains its lustre over millennia. Exam question 2 of lesson 2 «Elements and the famous members of the periodic table» of the chemistry course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's cho
---

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# Exam question 2 · Elements and the famous members of the periodic table

<!-- .ven lang=en -->
Identify the principal reason for which gold retains its lustre over millennia.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 3 · wrong ✗ · **Who acts:** you, gold · **What happens:** identify, retain · **To what, where:** principal reason, lustre, millennia

<!-- .vabout -->
This is exam question 2 of lesson 2 «Elements and the famous members of the periodic table» of the chemistry course of Mova's primary school, asked in stiff, formal language. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/chemistry/2-elements-and-the-periodic-table/#e2).

## The question {#question}

```conllu
# sent_id = question:chemistry:2-elements-and-the-periodic-table:e2:1
# text = Identify the principal reason for which gold retains its lustre over millennia.
1	Identify	identify	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
3	principal	principal	ADJ	JJ	Degree=Pos	4	amod	_	_
4	reason	reason	NOUN	NN	Number=Sing	1	obj	_	_
5	for	for	ADP	IN	_	6	case	_	_
6	which	which	PRON	WDT	PronType=Rel	8	obl	_	_
7	gold	gold	NOUN	NN	Number=Sing	8	nsubj	_	_
8	retains	retain	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	acl:relcl	_	_
9	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	10	nmod:poss	_	_
10	lustre	lustre	NOUN	NN	Number=Sing	8	obj	_	_
11	over	over	ADP	IN	_	12	case	_	_
12	millennia	millennia	NOUN	NN	Number=Sing	8	obl	_	SpaceAfter=No
13	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **identify** | imperative | you *not said here* | the principal reason |  |  |  |  | vn characterize-29.2-1-1 «NP V NP S\_ING»: agent=Agent reason=Theme |
| 2 | **retain** | present | gold | gold's lustre |  | millennia |  | for the principal reason | tree rules |

<!-- .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.

## The options {#options}

### Option 1 · ← Mova's choice {#o1}

<!-- .ven lang=en -->
The continual polishing it receives from its owners

```conllu
# sent_id = question:chemistry:2-elements-and-the-periodic-table:e2:o1:1
# text = The continual polishing it receives from its owners
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	continual	continual	NOUN	NN	Number=Sing	5	nsubj	_	_
3	polishing	polish	VERB	VBG	VerbForm=Ger	2	acl	_	_
4	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	obj	_	_
5	receives	receive	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
6	from	from	ADP	IN	_	8	case	_	_
7	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	8	nmod:poss	_	_
8	owners	owner	NOUN	NNS	Number=Plur	5	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **polish** | gerund | the continual *not said here* | continual |  |  |  |  | vn butter-9.9 «NP V NP.destination»: agent=Agent it=Destination |
| 2 | **receive** | present | the continual |  |  | continual's owners |  |  | vn obtain-13.5.2 «NP V NP PP.source»: agent=Agent from owner=Source |

### Option 2 {#o2}

<!-- .ven lang=en -->
The exceptional mass of its constituent atoms

```conllu
# sent_id = question:chemistry:2-elements-and-the-periodic-table:e2:o2:1
# text = The exceptional mass of its constituent atoms
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
2	exceptional	exceptional	ADJ	JJ	Degree=Pos	3	amod	_	_
3	mass	mass	NOUN	NN	Number=Sing	0	root	_	_
4	of	of	ADP	IN	_	7	case	_	_
5	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	7	nmod:poss	_	_
6	constituent	constituent	NOUN	NN	Number=Sing	7	compound	_	_
7	atoms	atom	NOUN	NNS	Number=Plur	3	nmod	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 3 · ✓ the right answer {#o3}

<!-- .ven lang=en -->
Its negligible reactivity with atmospheric oxygen and with water

```conllu
# sent_id = question:chemistry:2-elements-and-the-periodic-table:e2:o3:1
# text = Its negligible reactivity with atmospheric oxygen and with water
1	Its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	3	nmod:poss	_	_
2	negligible	negligible	ADJ	JJ	Degree=Pos	3	amod	_	_
3	reactivity	reactivity	NOUN	NN	Number=Sing	0	root	_	_
4	with	with	ADP	IN	_	6	case	_	_
5	atmospheric	atmospheric	NOUN	NN	Number=Sing	6	compound	_	_
6	oxygen	oxygen	NOUN	NN	Number=Sing	3	nmod	_	_
7	and	and	CCONJ	CC	_	9	cc	_	_
8	with	with	ADP	IN	_	9	case	_	_
9	water	water	NOUN	NN	Number=Sing	3	conj	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 4 {#o4}

<!-- .ven lang=en -->
Its concealment beneath a transparent protective lacquer applied by goldsmiths

```conllu
# sent_id = question:chemistry:2-elements-and-the-periodic-table:e2:o4:1
# text = Its concealment beneath a transparent protective lacquer applied by goldsmiths
1	Its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	2	nmod:poss	_	_
2	concealment	concealment	NOUN	NN	Number=Sing	8	nsubj	_	_
3	beneath	beneath	ADP	IN	_	7	case	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
5	transparent	transparent	ADJ	JJ	Degree=Pos	7	amod	_	_
6	protective	protective	ADJ	JJ	Degree=Pos	7	amod	_	_
7	lacquer	lacquer	NOUN	NN	Number=Sing	2	nmod	_	_
8	applied	apply	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
9	by	by	ADP	IN	_	10	case	_	_
10	goldsmiths	goldsmith	NOUN	NNS	Number=Plur	8	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **apply** | participle | Its concealment beneath a transparent protective lacquer |  |  |  |  | by goldsmiths | vn put-9.1-1 «NP V NP PP.destination»: agent=Agent by goldsmith=Destination |
| 2 | **conceal** |  | Its *= it* |  |  |  |  | beneath a transparent protective lacquer | nom concealment «state transitive»: poss=agent beneath=obl |

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**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

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