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.

[EX Q]: Context : PSR J1719-1438 was discovered in 2011 by the High Time Resolution Survey, a radio astronomy search for astronomical objects that rapidly vary in radio brightness, such as pulsars. 
Question : What is the constellation that PSR J1719-1438 is a part of?
[EX A]: constellation

[EX Q]: Context : Blackadder Goes Forth is the fourth and final series of the BBC sitcom Blackadder, written by Richard Curtis and Ben Elton, which aired from 28 September to 2 November 1989 on BBC One. 
Question : Where can you find the show Blackadder Goes Forth?
[EX A]: original network

[EX Q]: Context : This member of the Virgo Cluster, located on its outskirts, is known as the Umbrella Galaxy due to the umbrella-shaped structure that extends from its disk to the east and that it is composed of stellar streams, being the remmants of a much smaller galaxy that has been torn apart by NGC 4651's tidal forces, something that explains why NGC 4651 has been included on Halton Arp's Atlas of Peculiar Galaxies as Arp 189 -galaxy with filaments-. 
Question : What constellation is NGC 4651 located in?
[EX A]:
constellation