TASK DEFINITION: Given two entities as input, classify as "yes" if second entity is the part of the first entity. Otherwise classify them as "no". These are entities of meronym In linguistics, meronymy is a semantic relation between a meronym denoting a part and a holonym denoting a whole. In simpler terms, a meronym (i.e., second entity) is in a part-of relationship with its holonym (i.e., first entity).
PROBLEM: Entity 1: drug 
 Entity 2: salt - excrete gland

SOLUTION: no

PROBLEM: Entity 1: pack plant 
 Entity 2: banana

SOLUTION: yes

PROBLEM: Entity 1: ancient continental-margin volcanic systems 
 Entity 2: rock

SOLUTION:
yes