A (freshwater snail) can be tropical.Logical formLearned from40 sentences. A (timber agreement) can be tropical.Logical formLearned from40 sentences. A tropical storm can be weakened.Logical formLearned from40 sentences. Tropical storm may pick_up speed.Logical formLearned from40 sentences. Tropical storm may take aim.Logical formLearned from40 sentences. Forms can be tropical.Logical formLearned from40 sentences. Tropical storm can be a hurricane.Logical formLearned from40 sentences. A us-state can be in tropical storm.Logical formLearned from40 sentences. A tropical island can be deserted.Logical formLearned from40 sentences. Rain can be from tropical storm.Logical formLearned from40 sentences. A fish can be tropical.Logical formLearned from40 sentences. Some tropical storms may develop in a (last year).Logical formLearned from40 sentences. A typhoon can be to a tropical storm.Logical formLearned from40 sentences. Tropical forests can be humid.Logical formLearned from39 sentences. A tropical rainforest can be lowland.Logical formLearned from39 sentences.