A person may sit_in on a group of supporters.Logical formLearned from7 sentences. A male may sit_in with a person.Logical formLearned from7 sentences. Persons may sit_in on (listening sessions) of an album.Logical formLearned from7 sentences. Persons may be sit_ined.Logical formLearned from7 sentences. A person may sit_in on classes.Logical formLearned from7 sentences. A person may sit_in on a couple of meetings.Logical formLearned from7 sentences. Persons may sit_in on classes.Logical formLearned from7 sentences. A male may sit_in with musicians.Logical formLearned from7 sentences. Officials may sit_in on a (crew meeting).Logical formLearned from7 sentences. A pilot may sit_in on a debriefing.Logical formLearned from7 sentences. A (guest judge) may sit_in on a panel.Logical formLearned from6 sentences. An adviser to a US-president may sit_in on meetings.Logical formLearned from6 sentences. A person may sit_in on a seminar.Logical formLearned from6 sentences. A male may sit_in on a class.Logical formLearned from6 sentences. A person may sit_in for hours.Logical formLearned from6 sentences.