What is an analogous split complementary color scheme?

The assignment (create a mandala) is as follows:

"Use an analogous split-complementary color scheme, with dominant and subordinate/ and subordinate/accent proportions. Saturation must be controlled and used in small amounts."

I can't find any actual examples of an analogous split-complementary color scheme and am confused as to what that would actually look like. I was going for a yellow-analogous-split complementary color scheme in my assignment but am confused as to what colors that would consist of. Thanks for any suggestions.