--- title: At the galaxy's centre is a black hole, a place where gravity is so… — The Milky Way · tree and pragmatics description: At the galaxy's centre is a black hole, a place where gravity is so strong that not even light can escape, called Sagittarius A*, about 4 million times the mass of the Sun, first imaged in 2022. Who acts: centre, gravity, light. A sentence of the lesson «The Milky Way» of the space course of Mova's --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/space/23-the-milky-way/10/) [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/) / [Space](https://md.mova.elamur.ai/free/en/corpora/school/space/) / [The Milky Way](https://md.mova.elamur.ai/free/en/corpora/school/space/23-the-milky-way/) / 10 # The Milky Way, sentence 10 At the galaxy's centre is a black hole, a place where gravity is so strong that not even light can escape, called Sagittarius A\*, about 4 million times the mass of the Sun, first imaged in 2022. **Who acts:** centre, gravity, light · **What happens:** be, escape, call, image · **To what, where:** black hole, 2022 · **Speech:** someone speaks here This is a sentence of the lesson «The Milky Way» of the space 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 (centre, gravity, light), what happens, when and where, as Mova's frames read it from the tree. ## The tree {#tree} ```conllu # sent_id = school:space:023-the-milky-way.lesson:10 # text = At the galaxy's centre is a black hole, a place where gravity is so strong that not even light can escape, called Sagittarius A*, about 4 million times the mass of the Sun, first imaged in 2022. # source = school lesson (ours) # course = space # lesson = 023-the-milky-way.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 At at ADP IN _ 5 case _ _ 2 the the DET DT Definite=Def|PronType=Art 3 det _ _ 3 galaxy galaxy NOUN NN Number=Sing 5 nmod:poss _ _ 4 's 's PART POS _ 3 case _ _ 5 centre centre NOUN NN Number=Sing 9 nsubj _ _ 6 is be AUX VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 9 cop _ _ 7 a a DET DT Definite=Ind|PronType=Art 9 det _ _ 8 black black ADJ JJ Degree=Pos 9 amod _ _ 9 hole hole NOUN NN Number=Sing 0 root _ _ 10 , , PUNCT , _ 9 punct _ _ 11 a a DET DT Definite=Ind|PronType=Art 12 det _ _ 12 place place NOUN NN Number=Sing 9 appos _ _ 13 where where ADV WRB PronType=Rel 17 advmod _ _ 14 gravity gravity NOUN NN Number=Sing 17 nsubj _ _ 15 is be AUX VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 17 cop _ _ 16 so so ADV RB _ 17 advmod _ _ 17 strong strong ADJ JJ Degree=Pos 12 acl:relcl _ _ 18 that that SCONJ IN _ 23 mark _ _ 19 not not PART RB Polarity=Neg 20 advmod _ _ 20 even even ADV RB _ 21 advmod _ _ 21 light light NOUN NN Number=Sing 23 nsubj _ _ 22 can can AUX MD VerbForm=Fin 23 aux _ _ 23 escape escape VERB VB VerbForm=Inf 17 ccomp _ _ 24 , , PUNCT , _ 25 punct _ _ 25 called call VERB VBN Tense=Past|VerbForm=Part|Voice=Pass 23 parataxis _ _ 26 Sagittarius Sagittarius PROPN NNP Number=Sing 27 compound _ _ 27 A A PROPN NNP Number=Sing 25 xcomp _ _ 28 * * PUNCT NFP _ 25 punct _ _ 29 , , PUNCT , _ 33 punct _ _ 30 about about ADV RB _ 32 advmod _ Agree=R5-strong|Haiku=31:advmod 31 4 4 NUM CD NumForm=Digit|NumType=Card 32 compound _ _ 32 million million NUM CD NumForm=Word|NumType=Card 33 nummod _ _ 33 times time NOUN NNS Number=Plur 23 obl:unmarked _ _ 34 the the DET DT Definite=Def|PronType=Art 35 det _ _ 35 mass mass NOUN NN Number=Sing 33 nmod:unmarked _ _ 36 of of ADP IN _ 38 case _ _ 37 the the DET DT Definite=Def|PronType=Art 38 det _ _ 38 Sun Sun PROPN NNP Number=Sing 35 nmod _ _ 39 , , PUNCT , _ 41 punct _ _ 40 first first ADV RB NumForm=Word|NumType=Ord 41 advmod _ _ 41 imaged image VERB VBN Tense=Past|VerbForm=Part|Voice=Pass 23 advcl _ _ 42 in in ADP IN _ 43 case _ _ 43 2022 2022 NUM CD NumForm=Digit|NumType=Card 41 obl _ _ 44 . . PUNCT . _ 9 punct _ _ ``` ## Pragmatics {#pragmatics} No stored speech act for this sentence. | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **is a** | present | the galaxy's centre | a black hole | | | | | tree rules | | 2 | **is** | present | gravity | | | | | strong *property* | tree rules | | 3 | **escape** | can | light | | | | time | | vn escape-51.1-1-1 «NP V»: agent=Theme | | 4 | **call** | participle | | | | | | | vn initiate\_communication-37.4.2-1 «NP V»: agent=Agent | | 5 | **image** | participle | light *not said here* | | | 2022 | | first *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. **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:space:023-the-milky-way.lesson:10`. **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: [The Milky Way, 9](https://md.mova.elamur.ai/free/en/corpora/school/space/23-the-milky-way/9/) - next →: [The Milky Way, 11](https://md.mova.elamur.ai/free/en/corpora/school/space/23-the-milky-way/11/) - ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/space/23-the-milky-way/)