A (retirement system) can be troubled.Logical formLearned from9 sentences. A (steel company) can be troubled.Logical formLearned from9 sentences. A note can be troubled.Logical formLearned from9 sentences. A performance can be troubled.Logical formLearned from9 sentences. An orchestra can be troubled.Logical formLearned from9 sentences. An odyssey can be troubled.Logical formLearned from9 sentences. Bridge can be over troubled waters.Logical formLearned from9 sentences. (Climate talks) can be troubled.Logical formLearned from9 sentences. A piece can be troubled.Logical formLearned from9 sentences. A (cell phone unit) can be troubled.Logical formLearned from9 sentences. A cowboy can be troubled.Logical formLearned from9 sentences. A (mining sector) can be troubled.Logical formLearned from9 sentences. Involvement can be troubled.Logical formLearned from9 sentences. Tottenhams can be troubled.Logical formLearned from9 sentences. An (air traffic control system) can be troubled.Logical formLearned from9 sentences.