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: solution 
 Entity 2: electron

SOLUTION: yes

PROBLEM: Entity 1: oil 
 Entity 2: myristic acid

SOLUTION: yes

PROBLEM: Entity 1: stem 
 Entity 2: tail

SOLUTION:
no