Complex sentence: The temporary crossing was created by the City of Sydney as part of the 35th anniversary celebration of the Sydney Mardi Gras, when the crossing was to be removed the community protests and internet activism campaign emerged.
Split into simpler sentences: The temporary crossing was created by the City of Sydney as part of the 35th anniversary celebration of the Sydney Mardi Gras. When the crossing was to be removed, the community protests and internet activism campaign emerged.