Complex sentence: On 1 October 2013, the remaining members announced Lostprophets breakup saying that they would "no longer make or perform music as Lostprophets" the announcement was signed by all of the band members (except Watkins).
Split into simpler sentences: On 1 October 2013, the remaining members announced Lostprophets breakup saying that they would "no longer make or perform music as Lostprophets". The announcement was signed by all of the band members (except Watkins).