An (exhibition hall) can be indoor.Logical formLearned from6 sentences. An indoor arena may be located in downtown.Logical formLearned from6 sentences. (Football pitches) can be indoor.Logical formLearned from6 sentences. Birds can be indoor.Logical formLearned from6 sentences. Robots can be indoor.Logical formLearned from6 sentences. (Rowing competitions) can be indoor.Logical formLearned from6 sentences. (Play activities) can be indoor.Logical formLearned from6 sentences. (Track facilities) can be indoor.Logical formLearned from6 sentences. Problems may be related to indoor (air quality).Logical formLearned from6 sentences. A running water can be indoor.Logical formLearned from6 sentences. Indoor (air quality) may undergo a degradation.Logical formLearned from6 sentences. A (practice space) can be indoor.Logical formLearned from6 sentences. Hazards can be indoor.Logical formLearned from6 sentences. Sinks can be indoor.Logical formLearned from6 sentences. A radiation can be indoor.Logical formLearned from6 sentences.