Complex sentence: The route between Lilydale and Warburton was originally proposed to be built as one of four experimental narrow gauge lines, however, the recommendation was not accepted and the Warburton line opened as broad gauge railway on Wednesday, 13 November 1901.
Split into simpler sentences: The route between Lilydale and Warburton was originally proposed to be built as one of four experimental narrow gauge lines. However, this proposal was overturned and the Warburton line opened as broad gauge railway on Wednesday, 13 November 1901.