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: embryo 
 Entity 2: pouch

SOLUTION: yes

PROBLEM: Entity 1: breast cancer 
 Entity 2: mucus

SOLUTION: no

PROBLEM: Entity 1: caracaras 
 Entity 2: carbon dioxide

SOLUTION:
no