Period can be necessary.Logical formLearned from13 sentences. Voting can be necessary.Logical formLearned from13 sentences. Kinds of (security measures) can be necessary.Logical formLearned from13 sentences. A resource can be necessary.Logical formLearned from13 sentences. A (military presence) can be necessary.Logical formLearned from13 sentences. A conflict can be necessary.Logical formLearned from13 sentences. Institutions can be necessary for an emergence of a palestinian state.Logical formLearned from13 sentences. Cash can be necessary.Logical formLearned from13 sentences. Changes to elements of a plan can be necessary.Logical formLearned from13 sentences. A hike can be necessary.Logical formLearned from13 sentences. A (police action) can be necessary.Logical formLearned from13 sentences. Comments can be necessary.Logical formLearned from13 sentences. A (death penalty) can be necessary for maintaining public security.Logical formLearned from13 sentences. Parts can be necessary.Logical formLearned from13 sentences. Bankruptcy can be necessary.Logical formLearned from13 sentences.