rank airport passengers handled change
2011/12
rank
airport
passengers handled
change 2011\\/12
number
number
number
number text number percentage
1 london heathrow 828531 0%
how many more passengers did london heathrow have than bristol ?
WRB JJ JJR NNS VBD-AUX NNP NNP VBD-AUX IN NNP .