Complex sentence: The band extensively tour Europe in 1993, alternatively as headline act or supporting U2, but by the end of the tour, relationships have soured again and a proposed US tour and MTV Unplugged album are scotched.
Split into simpler sentences: The band extensively tour Europe in 1993, alternatively as headline act or supporting U2. By the end of the tour, relationships have soured again and a proposed US tour and MTV Unplugged album are scotched.