Trial is related to Event. Event is related to Track. Track is a synonym of Pitch. 
Agreement is a synonym of Consent. Consent is the opposite of Oppose. Oppose is a synonym of Pit. 
Trial <--RelatedTo--> Event <--RelatedTo--> Track <--Synonym--> Pitch 
Agreement <--Synonym--> Consent <--Antonym--> Oppose <--Synonym--> Pit 