A flock can be constituted-of-or-filled-with migratory birds.Logical formLearned from18 sentences. A group can be migratory.Logical formLearned from18 sentences. Migratory birds can be dead.Logical formLearned from18 sentences. Species can be migratory.Logical formLearned from17 sentences. Tribes can be migratory.Logical formLearned from17 sentences. A wildfowl can be migratory.Logical formLearned from17 sentences. Migratory birds may begin.Logical formLearned from17 sentences. Policies can be migratory.Logical formLearned from16 sentences. An activity can be migratory.Logical formLearned from16 sentences. Thousands can be constituted-of-or-filled-with migratory waterfowl.Logical formLearned from16 sentences. Birds can be migratory.Logical formLearned from16 sentences. Tendencies can be migratory.Logical formLearned from16 sentences. A habitat can be migratory.Logical formLearned from16 sentences. (Farm workers) can be migratory.Logical formLearned from16 sentences. (Land birds) can be migratory.Logical formLearned from16 sentences.