Regions may obscure by dust.Logical formLearned from2 sentences. Smoke may obscure targets.Logical formLearned from2 sentences. Some forms of light pollution may obscure stars.Logical formLearned from2 sentences. An area may obscure by an item of clothing.Logical formLearned from2 sentences. A black line may obscure by a rectangle.Logical formLearned from2 sentences. A reputation may obscure a fact.Logical formLearned from2 sentences. A female may obscure by smoke.Logical formLearned from2 sentences. Statistics may obscure a fact.Logical formLearned from2 sentences. Features of interest may obscure by materials.Logical formLearned from2 sentences. A vision may obscure by a fog.Logical formLearned from2 sentences. A controversy may obscure a debate.Logical formLearned from2 sentences. A male may obscure a purpose.Logical formLearned from2 sentences. Parts may obscure by a conduct.Logical formLearned from2 sentences. Limestone may obscure by mud.Logical formLearned from2 sentences. (Ground fog) may obscure vision.Logical formLearned from2 sentences.