Complex sentence: Trials of the Bhim artillery system were successfully conducted in 1998 and 1999, but it remained on pause for over 10 years as Denel was blacklisted by the Indian government.
Split into simpler sentences: Trials of the Bhim artillery system were successfully conducted in 1998 and 1999. But it remained on pause for over 10 years as Denel was blacklisted by the Indian government.