A field can be blank.Logical formLearned from38 sentences. A sample can be blank.Logical formLearned from37 sentences. A canvass can be blank.Logical formLearned from37 sentences. A post can be blank.Logical formLearned from37 sentences. An envelope can be blank.Logical formLearned from37 sentences. A field may be left blank.Logical formLearned from37 sentences. A hard drive can be blank.Logical formLearned from36 sentences. Expression can be blank.Logical formLearned from36 sentences. A fee can be a blank check.Logical formLearned from36 sentences. A film can be blank.Logical formLearned from36 sentences. A president may have a blank check.Logical formLearned from36 sentences. A female may point blank.Logical formLearned from35 sentences. A (tv screen) can be blank.Logical formLearned from35 sentences. Tickets can be blank.Logical formLearned from35 sentences. Maps can be blank.Logical formLearned from35 sentences.