Is there a chart or something that shows which players can train which SA's? For example, I have an older MC with Free Kick SA who scores a lot of FK goals. I want to replace him, so I bought an 18 year old Fast Trainer MC that I want to train with Free Kicks but it isn't in his list of options (he has PK, Dribbler, Corners, and Playmaker). Since both players are MC, obviously he could have had FK on his list but didn't. Is it random?