A mode may undergo an addition.Logical formLearned from49 sentences. An addition may be made.Logical formLearned from49 sentences. Forces may undergo an addition.Logical formLearned from49 sentences. A child may undergo an addition.Logical formLearned from48 sentences. Cities may undergo an addition.Logical formLearned from48 sentences. Hydrogen may undergo an addition.Logical formLearned from48 sentences. A line may undergo an addition.Logical formLearned from48 sentences. An addition can be to the world.Logical formLearned from48 sentences. Modules may undergo an addition.Logical formLearned from48 sentences. A room may undergo an addition.Logical formLearned from48 sentences. An addition can be to a menu.Logical formLearned from48 sentences. A book can be an addition to literature.Logical formLearned from48 sentences. Nitrogen may undergo an addition.Logical formLearned from48 sentences. A world-city may undergo an addition.Logical formLearned from48 sentences. Characters may undergo an addition.Logical formLearned from47 sentences.