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).

Entity 1: pathway 
 Entity 2: mononuclear cell
no
A mononuclear cell is a type of white blood cell that has only one nucleus in the cytoplasm. It does not have any parts, so it cannot be part of another entity, such as a pathway. Therefore, the answer is "no"..