Question: The track "To Know Him Is to Love Him" appears on the compilation set "Back to Mono" produced by whom? 
Sentence (from "Back to Mono (1958–1969)"): Back to Mono (1958–1969) is a box set (4 compact discs or 5 vinyl LPs) compilation of the recorded work of record producer Phil Spector, through the 1960s, released in 1991 by ABKCO as #7118-2.
Relevant evidence: Yes