A lens may be replaced.Logical formLearned from16 sentences. A population may replace itself.Logical formLearned from16 sentences. A (power supply) may be replaced.Logical formLearned from16 sentences. A seal may be replaced.Logical formLearned from16 sentences. A male may replace a ball.Logical formLearned from16 sentences. Jobs may be replaced by jobs.Logical formLearned from16 sentences. Passions may be replaced by pragmatism.Logical formLearned from16 sentences. A (skin graft) may replace skin with skin.Logical formLearned from16 sentences. Surgeons may replace part of an (ankle joint) with a (plastic device).Logical formLearned from16 sentences. A person may replace a governor.Logical formLearned from16 sentences. A ball may be replaced by balls.Logical formLearned from16 sentences. A person may replace during a year of an administration.Logical formLearned from16 sentences. A US-president may replace a US-president.Logical formLearned from16 sentences. Objects may be replaced.Logical formLearned from16 sentences. A world-city may replace some pounds of low-enriched uranium.Logical formLearned from16 sentences.