source: The Freedom Trail was originally conceived in 1958 by local journalist William Schofield who was promoting the idea of linking important local landmarks with a pedestrian trail since 1951.
target: The Freedom Trail was originally conceived in 1958 by local journalist William Schofield.  He was promoting the idea of linking important local landmarks with a pedestrian trail since 1951.
references: The Freedom Trail was originally conceived in 1958 by local journalist William Schofield.  He was promoting the idea of linking important local landmarks with a pedestrian trail since 1951.