Computer can be used for Process. Computer is related to Energy. Energy is related to Emerge. 
Reservation is a synonym of Reserve. Reserve is related to Emergency. Emergency is related to Area. Scene is a type of Area. 
Process <--UsedFor-- Computer <--RelatedTo--> Energy <--RelatedTo--> Emerge 
Reservation <--Synonym--> Reserve <--RelatedTo--> Emergency <--RelatedTo--> Area <--IsA-- Scene 