Fluid is related to Eye. Eye is related to Skull. Skull is related to Neck. Neck is related to Box. 
Inner is related to Conscience. Conscience is related to Internal. Internal is related to Door. 
Fluid <--RelatedTo--> Eye <--RelatedTo--> Skull <--RelatedTo--> Neck <--RelatedTo--> Box 
Inner <--RelatedTo--> Conscience <--RelatedTo--> Internal <--RelatedTo--> Door 