A female may sit_in on a production of an early show.Logical formLearned from1 sentences. A female may sit_in on lessons.Logical formLearned from1 sentences. An employee may sit_in on a meeting.Logical formLearned from1 sentences. An aide may sit_in on a call.Logical formLearned from1 sentences. A person may sit_in for a song.Logical formLearned from1 sentences. A (bass player) may sit_in with a band.Logical formLearned from1 sentences. A husband may sit_in on a lesson.Logical formLearned from1 sentences. A male may sit_in as a pundit.Logical formLearned from1 sentences. A look-alike may sit_in for a male.Logical formLearned from1 sentences. A person may sit_in between tables.Logical formLearned from1 sentences. A person may sit_in with cheap tricks.Logical formLearned from1 sentences. A male may sit_in on a (recording session).Logical formLearned from1 sentences. A negotiator may sit_in on part of a session.Logical formLearned from1 sentences. (Fiddle player) may sit_in with a male.Logical formLearned from1 sentences. A singer-songwriter may sit_in as (guest singer).Logical formLearned from1 sentences.