A focus of some researcher may shift to spacecraft.Logical formLearned from8 sentences. A spacecraft can be plucky.Logical formLearned from8 sentences. An astronaut can be on a spacecraft.Logical formLearned from8 sentences. Fleets can be constituted-of-or-filled-with spacecraft.Logical formLearned from8 sentences. A spacecraft may roll to a stop.Logical formLearned from8 sentences. A spacecraft may fail.Logical formLearned from8 sentences. A person may build a spacecraft.Logical formLearned from8 sentences. Commands may control a spacecraft.Logical formLearned from8 sentences. A spacecraft may approach a planet.Logical formLearned from8 sentences. A spacecraft may be accomplished.Logical formLearned from8 sentences. A spacecraft may be seen in the sky.Logical formLearned from8 sentences. A lander can be a spacecraft.Logical formLearned from8 sentences. A view may pertain-to a spacecraft.Logical formLearned from8 sentences. A spacecraft may be located.Logical formLearned from8 sentences. A US-city can be a spacecraft.Logical formLearned from8 sentences.