Professor organized a pair of community lectures on how to live an environmentalist life.He scheduled the lecture for two consecutive Wednesday evenings.Professor signed the following valid and binding contract with Caterer to provide beverages and food after each lecture:

Must provide vegetarian meals only!Thank you!

Unfortunately, the Caterer gave the Professor both meat and vegetables for the event.After the Professor realised this, he demanded a refund from the Caterer, and if the Caterer refused to give a refund, the Professor would complain to the newspaper.The Caterer threatened the Professor that if he did not drop his complaint to the newspaper, the Caterer would kidnap the Professor's cat.The Professor is now scared and worried for his cat's safety.

Advise the Professor.Please provide your suggestions and support your answer with relevant real cases and examples.