Complex sentence: Avalanche opened in 1988 and was the first ever Bobsled type roller coaster to be constructed in the UK, it was also the third Bobsled coaster built by Mack Rides, who were in competition with Intamin, the only other company who designed Steel Bobsled Coasters.
Split into simpler sentences: Avalanche opened in 1988 and was the first Bobsled type roller coaster to be constructed in the United Kingdom. It was the third Bobsled coaster built by Mack Rides, who were in competition with Intamin, the only other company who designed Steel Bobsled Coasters.