An obstacle may present an opportunity.Logical formLearned from12 sentences. A law can be an obstacle.Logical formLearned from12 sentences. Obstacles can be false.Logical formLearned from12 sentences. Obstacles can be ridiculous.Logical formLearned from12 sentences. Obstacles can be clear.Logical formLearned from12 sentences. An (obstacle course) may pertain-to a male.Logical formLearned from12 sentences. An (obstacle course) can be timed.Logical formLearned from12 sentences. An obstacle to creating a vaccine can be a genetic variability of a virus.Logical formLearned from12 sentences. An obstacle can be in a country.Logical formLearned from12 sentences. A bunch can be constituted-of-or-filled-with obstacles.Logical formLearned from12 sentences. Obstacles can be on a path.Logical formLearned from12 sentences. An obstacle can be solid.Logical formLearned from12 sentences. An obstacle can be a weather.Logical formLearned from12 sentences. Obstacles can be unbelievable.Logical formLearned from12 sentences. Funding can be an obstacle.Logical formLearned from12 sentences.