31.   A small crowd of mourners stopped in the parking lot outside the shop Tuesday, placing bouquets of flowers, messages and helium balloons.

32.   Amid the dozens of bouquets that adorned the cathedral Monday night was a single blue and yellow helium balloon anchored by a plastic bag filled with seashells.

33.   Both pilots were killed when a helicopter gunship shot down their helium balloon during an international race on Tuesday.

34.   Both pilots were killed when a helicopter gunship shot down their helium balloon during an international race that had started three days before in Wil, Switzerland.

35.   For this trip, Branson plans to ride the jet stream with a helium balloon, with propane burners helping keep the gas expanded during darkness.

36.   Rutan and Abruzzo will travel in a giant helium balloon, Global Hilton.

37.   Sunlight glinted off the combination hot air and helium balloon as it glided slowly away from the resort in perfect conditions.

38.   Sunlight glinted off the combination hot air and helium balloon as it glided slowly away from the resort in perfect conditions early Wednesday.

39.   The Belarussian military shot down a helium balloon during an international race, killing its two American pilots, Belarus and U.S. officials said Wednesday.

40.   The helium balloon was participating in an international race and had drifted over the border from Poland.

n. + balloon >>共 79
hot-air 26.61%
water 14.25%
helium 11.83%
decoy 4.84%
gas 4.30%
angioplasty 2.69%
hydrogen 2.42%
air 2.15%
sport 1.88%
thought 1.61%
helium + n. >>共 33
balloon 38.60%
gas 13.16%
atom 9.65%
nucleus 6.14%
reserve 2.63%
lift 1.75%
cell 1.75%
discovery 1.75%
isotope 1.75%
conservation 1.75%
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