There’s a “Greenway park” near me, built where a train had previously roamed for over 100 years. The park is narrow and not much wider than the width of railroad cars. It cuts a nice path for local residents to use to walk across town, and it’s a relaxing trail to parks and schools and to walk a dog. Which is good since that rail mode of transportation has been replaced mostly by the automobile.
Former Google search engineer Andrew Hogue, now the head of search at Foursquare, was in charge of a project at Google called the Annotation Framework project.
He put together a team in the mid-2000s who pursued patents on a range of related topics involving something called a browseable fact repository, which would later grow into Google’s Knowledge Graph.