A green flag can be on a roof of a structure.Logical formLearned from17 sentences. A roof may be designed by architect.Logical formLearned from17 sentences. A roof may collapse after an explosion.Logical formLearned from17 sentences. A tip may pertain-to a roof.Logical formLearned from17 sentences. A surface may pertain-to a roof.Logical formLearned from17 sentences. A roof may be shuted.Logical formLearned from17 sentences. An (apartment building) may be hited on a roof.Logical formLearned from17 sentences. Some roofs may be blow_offed.Logical formLearned from17 sentences. Some homes may lose roofs.Logical formLearned from17 sentences. Some buildings may lose roofs.Logical formLearned from17 sentences. A roof may pertain-to a (water park).Logical formLearned from17 sentences. A roof can be as a male.Logical formLearned from17 sentences. A roof can be over a stadium.Logical formLearned from16 sentences. A portion of a roof may collapse.Logical formLearned from16 sentences. Roofs can be tiered.Logical formLearned from16 sentences.