A feature may pertain-to a park.Logical formLearned from221 sentences. Features may pertain-to a game.Logical formLearned from221 sentences. Features can be experimental.Logical formLearned from220 sentences. Features may pertain-to a product.Logical formLearned from220 sentences. Persons may add features.Logical formLearned from220 sentences. Features may work.Logical formLearned from220 sentences. Features can be observed.Logical formLearned from220 sentences. A feature can be rare.Logical formLearned from218 sentences. Features can be primitive.Logical formLearned from218 sentences. (Security features) can be enhanced.Logical formLearned from215 sentences. A handful can be constituted-of-or-filled-with features.Logical formLearned from214 sentences. Dozens can be constituted-of-or-filled-with features.Logical formLearned from214 sentences. An (update feature) can be advanced.Logical formLearned from213 sentences. A feature may pertain-to a building.Logical formLearned from213 sentences. A person may use features.Logical formLearned from213 sentences.