Complex sentence: After an injunction attempt was blocked in 1969, the plant began operations in 1972 peaking at 2,300 of the predicted 12,000 jobs and was closed in 1990, with all but of the property being sold back to Howard Research and Development.
Split into simpler sentences: After an injunction attempt was blocked in 1969, the plant began operations in 1972, peaking at 2,300 of the predicted 12,000 jobs. It was closed in 1990, with all but of the property being sold back to Howard Research and Development.