A (gas balloon competition) can be annual.Logical formLearned from13 sentences. A balloon can be unmanned.Logical formLearned from13 sentences. Balloons may be released into air.Logical formLearned from12 sentences. A series can be constituted-of-or-filled-with balloons.Logical formLearned from12 sentences. A balloon may have fuel.Logical formLearned from12 sentences. (Thought balloons) may undergo a use.Logical formLearned from12 sentences. A balloon can be hybrid.Logical formLearned from12 sentences. A balloon may pertain-to a government-agency.Logical formLearned from12 sentences. A hot-air balloon can be tethered.Logical formLearned from12 sentences. A (helium balloon) may pertain-to the world.Logical formLearned from12 sentences. A ride can be in a hot-air balloon.Logical formLearned from12 sentences. A balloon may disappear.Logical formLearned from12 sentences. Thousands of red balloons may nestle in netting above a (convention floor).Logical formLearned from12 sentences. A balloon can be colorful.Logical formLearned from12 sentences. A balloon may pertain-to a world-city.Logical formLearned from12 sentences.