###INSTRUCTION: Fix grammaticality: In some role plays, like about " Opa Catering, " fact I had known before the negotiation appeared to being incorrect in view of the information providing since the opponent.
###RESPONSE: 
In some role plays, like in " Opa Catering ", facts I had known before the negotiation appeared to be incorrect in view of the information provided by the opponent.
In some roles played by actors, like "Opa Catering," "fact I have known before the negotiation appeared to be incorrect in view of the information provided from the opponent.