TASK DEFINITION: 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.
PROBLEM: Context : ``The Way We Weren't'' is the twentieth episode of The Simpsons' fifteenth season. 
Question : What series is The Way We Weren't part of?

SOLUTION: series

PROBLEM: Context : Since 1998, GSD&M has been part of the Omnicom Group. 
Question : Which company is the parent company of GSD&M?

SOLUTION: parent company

PROBLEM: Context : The Bayer designation Rho Sagittarii (Rho Sgr, ρ Sagittarii, ρ Sgr) is shared by two stars, ρ¹ Sagittarii and ρ² Sagittarii, in the constellation Sagittarius. 
Question : What is the constellation that is made with Rho Sagittarii?

SOLUTION:
constellation