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: nuclear fission 
 Entity 2: atom

SOLUTION: yes

PROBLEM: Entity 1: brook lamprey 
 Entity 2: skull

SOLUTION: no

PROBLEM: Entity 1: arctic fox 
 Entity 2: body shape

SOLUTION:
yes