A compound can be empty.Logical formLearned from34 sentences. An island can be empty.Logical formLearned from34 sentences. An empty string may be returned.Logical formLearned from34 sentences. A white room can be empty.Logical formLearned from34 sentences. A vase can be empty.Logical formLearned from34 sentences. (Water jugs) can be empty.Logical formLearned from34 sentences. A point can be empty.Logical formLearned from34 sentences. A (water tank) can be empty.Logical formLearned from34 sentences. A machine can be empty.Logical formLearned from34 sentences. A club can be empty.Logical formLearned from34 sentences. A yacht can be empty.Logical formLearned from34 sentences. Markets can be empty.Logical formLearned from34 sentences. (Ballot boxes) can be empty.Logical formLearned from34 sentences. Restaurants can be empty.Logical formLearned from34 sentences. A (life raft) can be empty.Logical formLearned from34 sentences.