"Before I die, I want to..."

SYRACUSE, N.Y. (AP) - It is public art made of private wishes.
In a phenomenon spreading across the globe, oversized blackboards, painted on buildings and freestanding displays, invite passers-by to complete the sentence: "Before I die I want to ..."
Answers, some profound, some profane, are written on stenciled lines with pieces of sidewalk chalk picked from the ground below.