Obstacles may undergo an accumulation.Logical formLearned from11 sentences. Obstacles may pertain-to the economy.Logical formLearned from11 sentences. An obstacle can be in bilateral relations.Logical formLearned from11 sentences. A person may eliminate an obstacle.Logical formLearned from11 sentences. An obstacle can be unwelcome.Logical formLearned from11 sentences. A bid may hit an obstacle.Logical formLearned from11 sentences. A move can be against an obstacle to (peace talks).Logical formLearned from11 sentences. An obstacle can be to attacks.Logical formLearned from11 sentences. Negotiations may face obstacles.Logical formLearned from11 sentences. Obstacles may be robbed.Logical formLearned from11 sentences. An obstacle to talks can be a program.Logical formLearned from11 sentences. An obstacle can be to an agenda.Logical formLearned from11 sentences. Efforts may face some obstacles.Logical formLearned from11 sentences. Persons may remove an obstacle.Logical formLearned from11 sentences. An obstacle can be in a bid.Logical formLearned from11 sentences.