Hundreds can be constituted-of-or-filled-with (helium balloons).Logical formLearned from12 sentences. A (gas balloon race) may pertain-to a country.Logical formLearned from12 sentences. An (altitude record) can be for a balloon.Logical formLearned from12 sentences. A balloon may begin.Logical formLearned from12 sentences. Thousands can be constituted-of-or-filled-with white balloons.Logical formLearned from12 sentences. Balloons can be into air.Logical formLearned from12 sentences. (Balloon pilots) may steer.Logical formLearned from12 sentences. A balloon may pertain-to adventurers.Logical formLearned from12 sentences. A balloon may cross into territory.Logical formLearned from12 sentences. Balloons may bear a symbol.Logical formLearned from12 sentences. A balloon may change course.Logical formLearned from12 sentences. Origins may pertain-to balloons.Logical formLearned from12 sentences. Activists may launch balloons.Logical formLearned from12 sentences. Balloons can be across a border.Logical formLearned from12 sentences. Balloons can be regular.Logical formLearned from12 sentences.