¹[In Rimsky-Korsakov's terminology, this means keys whose tonic triad can be found in a given key -- so, relative to C major, keys that are in the first degree of relatedness would include F, G, and C major, and D, E, and A minor -- but he also expands it to "include...the minor subdominant, mediant, and supertonic", i.e. F minor, E minor, and B minor, "which had heretofore been considered in the second or third degree of relatedness". And "in the minor mode, a similar occurrence takes place with the inclusion of the major dominant as well as the major submediant and subtonic (in...A minor, that would mean E, F, and G major)."

So Rimsky's saying that since F minor is the iv of C, and C is the V of F minor, then the relationship is reciprocal enough to be "first-degree". Fair enough, I like "Song For Strayhorn" too, though I think I prefer "No Expectations" to "No Surprises", so.]