Complex sentence: During Aiko's performance in April at the 2014 Coachella festival she premiered a live rendition of a song entailed "Spotless Mind", the performance included her band and a string quartet.
Split into simpler sentences: During Aiko's performance in April at the 2014 Coachella Festival, she premiered a live rendition of "Spotless Mind". The performance included her band and a string quartet.