Sit is related to Circle. Circle is related to Curve. Curve is related to Bell. 
Sensation is related to Touch. Touch is related to Kill. Kill requires Pray. 
Sit <--RelatedTo--> Circle <--RelatedTo--> Curve <--RelatedTo--> Bell 
Sensation <--RelatedTo--> Touch <--RelatedTo--> Kill --HasPrerequisite--> Pray 