Plan is related to Agenda. Agenda is related to Meeting. Arena can be used for Meeting. Arena can be used for Gathering. 
Found is the opposite of Dissolve. Dissolve is a synonym of Dismiss. Dismiss is a type of Reject. Reject is the opposite of Accept. 
Plan <--RelatedTo--> Agenda <--RelatedTo--> Meeting <--UsedFor-- Arena --UsedFor--> Gathering 
Found <--Antonym--> Dissolve <--Synonym--> Dismiss --IsA--> Reject <--Antonym--> Accept 