Could someone please help with the parsing of 23a and 28a?
I'm finding the instructions to be decidedly unhelpful! I have the thematic shape, the cells to be highlighted and the two straight lines. However, "extend this highlighting to where the group originates", is baffling me. To me, there is a source and a creator, am I overthinking things or just misunderstanding what is intended. It seems obvious what to do, but like I say, the instructions don't help much'