Some (oil firms) may have a base.Logical formLearned from13 sentences. A base may pertain-to a forest.Logical formLearned from13 sentences. A high-security prison can be at a base.Logical formLearned from13 sentences. An attack can be on an (army base).Logical formLearned from13 sentences. A detention can be at a (naval base).Logical formLearned from13 sentences. A base can be legendary.Logical formLearned from13 sentences. A base can be for (relief operations).Logical formLearned from13 sentences. Some nationals may be repatriated from a base.Logical formLearned from13 sentences. A hand may strike a base.Logical formLearned from13 sentences. An attack can be on a (police base).Logical formLearned from13 sentences. A base can be for training.Logical formLearned from13 sentences. A (planning base) can be in a country.Logical formLearned from13 sentences. Detainees may be transferred to a (naval base).Logical formLearned from13 sentences. An (air base) can be in an archipelago.Logical formLearned from13 sentences. A base may undergo an upgrading.Logical formLearned from13 sentences.