Aircraft may undergo formations.Logical formLearned from40 sentences. A formation can be armoured.Logical formLearned from40 sentences. Troops may undergo a formation.Logical formLearned from40 sentences. Opinions may undergo a formation.Logical formLearned from40 sentences. A city may undergo a formation.Logical formLearned from40 sentences. Wrinkles may undergo a formation.Logical formLearned from40 sentences. A lawyer may undergo a formation.Logical formLearned from40 sentences. Stages can be constituted-of-or-filled-with formation.Logical formLearned from40 sentences. A free-trade area may undergo a formation.Logical formLearned from40 sentences. Community may undergo a formation.Logical formLearned from40 sentences. A region can be constituted-of-or-filled-with (star formation).Logical formLearned from40 sentences. Students may undergo a formation.Logical formLearned from40 sentences. Cancer may undergo a formation.Logical formLearned from40 sentences. A formation can be strong.Logical formLearned from40 sentences. Defects may undergo a formation.Logical formLearned from40 sentences.