Task: Question Generation
Input (English): Context : MOA-2009-BLG-387L is a red dwarf in the Sagittarius constellation that is host to the planet MOA-2009-BLG-387Lb. 
Subject : MOA-2009-BLG-387L 
Relation : constellation
Output (English): What constellation is MOA-2009-BLG-387L part of?