Complex sentence: STORM was appointed as a member of the government-sponsored "Oak Ridges Moraine Technical Working Committee;" with operations from 1991 to 1994, the committee's task was to produce a long-term preservation strategy for the moraine.
Split into simpler sentences: STORM was appointed as a member of the government-sponsored Oak Ridges Moraine Technical Working Committee. Its task was to develop a long-term preservation strategy for the moraine.