(Surveillance trips) may pertain-to a male.Logical formLearned from20 sentences. (Surveillance trips) can be lengthy.Logical formLearned from20 sentences. A trip may come on heels of a visit.Logical formLearned from20 sentences. A wife may accompany a male on a trip.Logical formLearned from20 sentences. A trip may come at a point.Logical formLearned from20 sentences. A trip can be in itself.Logical formLearned from20 sentences. A trip may undergo findings.Logical formLearned from20 sentences. Trips can be challenging.Logical formLearned from20 sentences. A trip can be in_doubt.Logical formLearned from19 sentences. A trip may include talks.Logical formLearned from19 sentences. A delegation may undergo a trip.Logical formLearned from19 sentences. A (ferry trip) can be short.Logical formLearned from19 sentences. A prize can be a trip to a US-city.Logical formLearned from19 sentences. A trip may last.Logical formLearned from19 sentences. A series can be constituted-of-or-filled-with (road trips).Logical formLearned from19 sentences.