(Kidney stones) may prevent steps.Logical formLearned from6 sentences. Progress can be in preventing tragedies.Logical formLearned from6 sentences. An anemia may be prevented.Logical formLearned from6 sentences. Parasites may prevent recovery from a female.Logical formLearned from6 sentences. Laws may be prevented.Logical formLearned from6 sentences. (Health care costs) may prevent business from starting.Logical formLearned from6 sentences. Coincidences may prevent a male from dismissing dreams.Logical formLearned from6 sentences. A deadlock may prevent an executive from meeting over a summer.Logical formLearned from6 sentences. An overhaul of a foreign policy may prevent persons from getting themselves.Logical formLearned from6 sentences. A kid may prevent locals from cheating for a male.Logical formLearned from6 sentences. Heavy rain may prevent a start.Logical formLearned from6 sentences. A weekday may prevent a suburb from enforcing a rule.Logical formLearned from6 sentences. A country may prevent some (naval ships) from entering.Logical formLearned from6 sentences. A law may prevent employees from filing lawsuits.Logical formLearned from6 sentences. (Side slits) may prevent binding.Logical formLearned from6 sentences.