Act is a type of Expression. Act is the opposite of Real. Real is related to Fact. 
Assistance is related to Welfare. Welfare is related to Government. Government is related to Rule. 
Expression <--IsA-- Act <--Antonym--> Real <--RelatedTo--> Fact 
Assistance <--RelatedTo--> Welfare <--RelatedTo--> Government <--RelatedTo--> Rule 