Not getting all data in event's console

I have created a schedule with the following data = scheduler.parse({ “id”:“1” , “start_date”:“2000-01-01 07:05” , “end_date”:“9999-01-01 00:00” , “text”:“English” , “details”:“English For Business”, “classroom”:“english class”, “rec_type”:“week_1___1#no”, “rec_pattern”: “week_1___1”, “event_length”:“300”}, “json”);

When I print the console log of tooltip’s event, There is no object of classroom. Does anyone know? What is the problem?