A biker wearing glass and a backpack rides near a fountain.
A biker is riding for a charity event through the center of town.
The fountain does not need to be in the center of the town and the charity even is not addressed as the reason why he is riding in the first sentence.
The biker might not be riding for a charity event, and the fountain might not be in the center of town.
Just because a biker is riding near a fountain does not mean the fountain is in the center of town. The fact that the biker is wearing glass and a backpack does not imply that it is for a charity event.