A US-president may board a plane.Logical formLearned from8 sentences. Rescuers may board a vessel.Logical formLearned from8 sentences. Troops may board.Logical formLearned from8 sentences. Authorities may board a boat.Logical formLearned from8 sentences. Visitors may board a ferry from manhattans.Logical formLearned from8 sentences. Citizens may board planes.Logical formLearned from8 sentences. Peacekeepers may board a plane.Logical formLearned from8 sentences. (Airport screening methods) may keep passengers from boarding airplanes.Logical formLearned from8 sentences. A female may board a jet.Logical formLearned from8 sentences. A male may board a ferry.Logical formLearned from8 sentences. Gunmen may board a bus.Logical formLearned from8 sentences. A military-or-other-action-organization may be boarded.Logical formLearned from8 sentences. Hijackers may board planes.Logical formLearned from8 sentences. Tourists may board.Logical formLearned from8 sentences. Activists may board a platform.Logical formLearned from8 sentences.