Task: Question Generation
Input (English): A popular trend in this era was remixing dance music hits into adult contemporary ballads, especially in the US, (for example, the "Candlelight Mix" versions of "Heaven" by DJ Sammy, "Listen To Your Heart" by D.H.T., and "Everytime We Touch" by Cascada). Adult contemporary has long characterized itself as family-friendly, but edited versions of "Perfect" by P!nk and "Forget You" by Cee Lo Green showed up in the format in 2011.
Output (English): What version of P!nk's "Perfect" appeared on adult contemporary radio in 2011?