What is the longest bridge in the world?
user
I have no clue.
assistant
Do  you know anything about the Danyang–Kunshan Grand Bridge?
user
I know that is a suspension bridge built in China that is  the longest single-arch bridge in the world at  37.2 km long.
assistant
What is the longest bridge in the world?
user
I have no clue.
assistant
Do  you know anything about the Danyang–Kunshan Grand Bridge?
user
I don’t have any content about the Danyang–Kunshan Grand Bridge.  Is this an actual bridge, or did you mean “Kunshan” as an abbreviation for “Kunshan City”?
assistant
What is the longest bridge in the world?