question: Per Blankens , Jesse Ignjatovic , and Evan Pragger replaced which two executives ?
answer: Nigel Lythgoe and Ken Warwick
turker_answer: Per Blankens , Jesse Ignjatovic , and Evan Pragger replaced Nigel Lythgoe and Ken Warick .
rule-based: Per Blankens , Jesse Ignjatovic , and Evan Pragger replaced Nigel Lythgoe and Ken Warwick two executives .