Involve is related to Drink. Drink is related to State. State is related to Poor. Poor is related to Homeless. 
Understand is a synonym of See. See is a synonym of Check. 
Involve <--RelatedTo--> Drink <--RelatedTo--> State <--RelatedTo--> Poor <--RelatedTo--> Homeless 
Understand <--Synonym--> See <--Synonym--> Check 