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: pine nut 
 Entity 2: iodine

SOLUTION: no

PROBLEM: Entity 1: lymphocyte 
 Entity 2: round nucleus

SOLUTION: yes

PROBLEM: Entity 1: gametangia 
 Entity 2: patch

SOLUTION:
no