--- title: Which of the following statements most accurately characterises the… — Black holes · tree and pragmatics description: Which of the following statements most accurately characterises the event horizon of a black hole? Exam question 1 of lesson 25 «Black holes» of the space course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was wrong. --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/questions/space/25-black-holes/e1/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [questions](https://md.mova.elamur.ai/free/en/corpora/questions/) / [Space](https://md.mova.elamur.ai/free/en/corpora/questions/space/) / [Black holes](https://md.mova.elamur.ai/free/en/corpora/questions/space/25-black-holes/) / e1 # Exam question 1 · Black holes Which of the following statements most accurately characterises the event horizon of a black hole? **Mova's choice:** option 1 · **The right answer:** option 3 · wrong ✗ · **What happens:** follow, characteris · **To what, where:** event horizon This is exam question 1 of lesson 25 «Black holes» of the space 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/space/25-black-holes/#e1). ## The question {#question} ```conllu # sent_id = question:space:25-black-holes:e1:1 # text = Which of the following statements most accurately characterises the event horizon of a black hole? 1 Which which PRON WDT PronType=Rel 8 nsubj _ _ 2 of of ADP IN _ 5 case _ _ 3 the the DET DT Definite=Def|PronType=Art 5 det _ _ 4 following follow VERB VBG VerbForm=Ger 5 amod _ _ 5 statements statement NOUN NNS Number=Plur 8 obl _ _ 6 most most ADV RBS Degree=Sup 7 advmod _ _ 7 accurately accurately ADV RB _ 8 advmod _ _ 8 characterises characteris VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 0 root _ _ 9 the the DET DT Definite=Def|PronType=Art 11 det _ _ 10 event event NOUN NN Number=Sing 11 compound _ _ 11 horizon horizon NOUN NN Number=Sing 8 obj _ _ 12 of of ADP IN _ 15 case _ _ 13 a a DET DT Definite=Ind|PronType=Art 15 det _ _ 14 black black ADJ JJ Degree=Pos 15 amod _ _ 15 hole hole NOUN NN Number=Sing 11 nmod _ SpaceAfter=No 16 ? ? PUNCT . _ 8 punct _ _ ``` | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **follow** | gerund | | | | | | | vn occur-48.3-1 «NP V»: agent=Theme | | 2 | **characteris** | present | | the event horizon of a black hole | | | | of the following statements; accurately *property* | tree rules | 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} It is the point at which light escapes ```conllu # sent_id = question:space:25-black-holes:e1:o1:1 # text = It is the point at which light escapes 1 It it PRON PRP Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs 4 nsubj _ _ 2 is be AUX VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 4 cop _ _ 3 the the DET DT Definite=Def|PronType=Art 4 det _ _ 4 point point NOUN NN Number=Sing 0 root _ _ 5 at at ADP IN _ 6 case _ _ 6 which which PRON WDT PronType=Rel 8 obl _ _ 7 light light NOUN NN Number=Sing 8 nsubj _ _ 8 escapes escape VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 4 acl:relcl _ _ ``` | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **is a** | present | It | the point | | | | | tree rules | | 2 | **escape** | present | light | | | the point | | | vn escape-51.1-1-1 «NP V»: agent=Theme | ### Option 2 {#o2} It is the bright, hard surface of the black hole itself ```conllu # sent_id = question:space:25-black-holes:e1:o2:1 # text = It is the bright, hard surface of the black hole itself 1 It it PRON PRP Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs 7 nsubj _ _ 2 is be AUX VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 7 cop _ _ 3 the the DET DT Definite=Def|PronType=Art 7 det _ _ 4 bright bright ADJ JJ Degree=Pos 7 amod _ SpaceAfter=No 5 , , PUNCT , _ 4 punct _ _ 6 hard hard ADJ JJ Degree=Pos 7 amod _ _ 7 surface surface NOUN NN Number=Sing 0 root _ _ 8 of of ADP IN _ 11 case _ _ 9 the the DET DT Definite=Def|PronType=Art 11 det _ _ 10 black black ADJ JJ Degree=Pos 11 amod _ _ 11 hole hole NOUN NN Number=Sing 7 nmod _ _ 12 itself itself PRON PRP Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Emp|Reflex=Yes 11 nmod:unmarked _ _ ``` | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **is a** | present | It | the bright hard surface | | | | of the black hole hole | tree rules | ### Option 3 · ✓ the right answer {#o3} It is the boundary beyond which nothing can return ```conllu # sent_id = question:space:25-black-holes:e1:o3:1 # text = It is the boundary beyond which nothing can return 1 It it PRON PRP Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs 4 nsubj _ _ 2 is be AUX VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 4 cop _ _ 3 the the DET DT Definite=Def|PronType=Art 4 det _ _ 4 boundary boundary NOUN NN Number=Sing 0 root _ _ 5 beyond beyond ADP IN _ 6 case _ _ 6 which which PRON WDT PronType=Rel 9 obl _ _ 7 nothing nothing PRON NN Number=Sing|PronType=Neg 9 nsubj _ _ 8 can can AUX MD VerbForm=Fin 9 aux _ _ 9 return return VERB VB VerbForm=Inf 4 acl:relcl _ _ ``` | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **is a** | present | It | the boundary | | | | | tree rules | | 2 | **return** | can | nothing | | | | | beyond the boundary | vn escape-51.1-1 «NP V»: agent=Theme | ### Option 4 {#o4} It is the orbit of the nearest star ```conllu # sent_id = question:space:25-black-holes:e1:o4:1 # text = It is the orbit of the nearest star 1 It it PRON PRP Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs 4 nsubj _ _ 2 is be AUX VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 4 cop _ _ 3 the the DET DT Definite=Def|PronType=Art 4 det _ _ 4 orbit orbit NOUN NN Number=Sing 0 root _ _ 5 of of ADP IN _ 8 case _ _ 6 the the DET DT Definite=Def|PronType=Art 8 det _ _ 7 nearest near ADJ JJS Degree=Sup 8 amod _ _ 8 star star NOUN NN Number=Sing 4 nmod _ _ ``` | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **is a** | present | It | the orbit | | | | of the nearest star | tree rules | **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. - ← previous: [Black holes, test 10](https://md.mova.elamur.ai/free/en/corpora/questions/space/25-black-holes/t10/) - next →: [Black holes, exam 2](https://md.mova.elamur.ai/free/en/corpora/questions/space/25-black-holes/e2/) - ↑ back to [Black holes](https://md.mova.elamur.ai/free/en/corpora/questions/space/25-black-holes/)