A pen may straddle a boundary.Logical formLearned from7 sentences. A (bias direction) can be for a pen.Logical formLearned from7 sentences. A pen can be between teeth.Logical formLearned from7 sentences. A pen can be with a nib.Logical formLearned from7 sentences. An array can be constituted-of-or-filled-with pens.Logical formLearned from7 sentences. Dogs can be in pens.Logical formLearned from7 sentences. A male may move a pen.Logical formLearned from7 sentences. Some presidents may pick_up pens.Logical formLearned from7 sentences. A chest can be in pen.Logical formLearned from7 sentences. A male may become (pen pals).Logical formLearned from7 sentences. A wall may surround a pen.Logical formLearned from7 sentences. A rear may pertain-to a pen.Logical formLearned from7 sentences. Taste of the future can be a pen.Logical formLearned from7 sentences. A pen may be fashioned from (police barricades).Logical formLearned from7 sentences. A male may live in a pen.Logical formLearned from7 sentences.