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: human body 
 Entity 2: melanin

SOLUTION: yes

PROBLEM: Entity 1: circuit 
 Entity 2: flow electron

SOLUTION: yes

PROBLEM: Entity 1: urine 
 Entity 2: waste product

SOLUTION:
yes