Needle is related to Shot. Gun can be used for Shot. Gun is related to Agent. 
Cruise is related to Ship. you are likely to find Captain in/at/on Ship. Captain is a synonym of Supervisor. Supervisor is a type of Superior. 
Needle <--RelatedTo--> Shot <--UsedFor-- Gun <--RelatedTo--> Agent 
Cruise <--RelatedTo--> Ship <--AtLocation-- Captain <--Synonym--> Supervisor --IsA--> Superior 