Operations can be mathematical.Logical formLearned from708 sentences. A phase may pertain-to an operation.Logical formLearned from707 sentences. An operation may pertain-to a company.Logical formLearned from706 sentences. Operations may pertain-to a group.Logical formLearned from699 sentences. A head may pertain-to operations.Logical formLearned from696 sentences. A military operation can be large-scale.Logical formLearned from690 sentences. Operations may continue.Logical formLearned from689 sentences. An operation can be secret.Logical formLearned from689 sentences. An operation may be performed.Logical formLearned from676 sentences. President may pertain-to operations.Logical formLearned from666 sentences. A facility may undergo an operation.Logical formLearned from663 sentences. An operation may start.Logical formLearned from658 sentences. An operation may pertain-to a US-city.Logical formLearned from648 sentences. A male may have an operation.Logical formLearned from648 sentences. An operation can be quiet.Logical formLearned from637 sentences.