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: skull 
 Entity 2: layer

SOLUTION: yes

PROBLEM: Entity 1: potato 
 Entity 2: electron

SOLUTION: no

PROBLEM: Entity 1: digestive system 
 Entity 2: large intestine

SOLUTION:
yes