Frown is related to Crowd. Crowd is the opposite of Individual. Individual is a type of Organism. Virus is a type of Organism. 
Battery can be used for Run. Run is a synonym of Travel. 
Frown <--RelatedTo--> Crowd <--Antonym--> Individual --IsA--> Organism <--IsA-- Virus 
Battery --UsedFor--> Run <--Synonym--> Travel 