Conscience is related to Importance. Importance is related to Necessary. Sleep can be Necessary. 
Buddy is related to Silver. Silver is related to Mineral. Mineral is the opposite of Rock. you are likely to find Rock in/at/on Field. 
Conscience <--RelatedTo--> Importance <--RelatedTo--> Necessary <--HasProperty-- Sleep 
Buddy <--RelatedTo--> Silver <--RelatedTo--> Mineral <--Antonym--> Rock --AtLocation--> Field 