"challenge" - key terms from Wikipedia

afc challenge	cup
american ninja challenge
challenge
challenge	and its prize
challenge	coin
challenge	cup
challenge	cup final
challenge	league
challenge	mode
challenge	of the gobots
challenge	of the super friends
challenge	results
challenge	reward
challenge	stradale
challenge	winner
challenge	winners
challenge	with team
client challenge
darpa grand challenge
elimination challenge
elimination challenge	prize
entries in the elimination challenge
european challenge	cup
final challenge
immunity challenge
immunity challenge	on day
immunity for the next challenge
immunity for this challenge
international lawn tennis challenge
master lock challenge
next immunity challenge
one million dollar paranormal challenge
pepsi challenge
portfolio challenge
quickfire challenge
re ga ma pa challenge
real life challenge
reward challenge
road rules challenge
rookie challenge
scrapheap challenge
skills challenge
solar challenge
super challenge
swiss challenge	league
trivia challenge
university challenge
urban challenge
won the immunity challenge
world football challenge