Teacher: Classify the relation of question with context to one of these categories: 1) award received, 2) based on, collection, 3) conflict, 4) constellation, 5) convicted of, 6) date of death, 7) director, 8) drafted by, 9) educated at, 10) medical condition, 11) military branch, 12) narrative location, 13) occupation, 14) original network, 15) parent company, 16) point in time, 17) production company, 18) residence, 19) series, 20) service entry, 21) sex or gender, 22) spouse, 23) standards body question.
Teacher: Now, understand the problem? If you are still confused, see the following example:
Context : Isaac Nicola Romero (1916 in Havana, Cuba -- 1997) was a prominent Cuban guitarist and one of the founders of the modern Cuban Guitar School. 
Question : What was Isaac Nicola's city of birth?
Solution: place of birth
Reason: The question is about the place of birth of the Isaac Nicola. Hence the output is relevant and valid

Now, solve this instance: Context : 77 Aquarii (abbreviated 77 Aqr) is a star in the equatorial constellation of Aquarius. 
Question : Which constellation is formed by 77 Aquarii?
Student:
constellation