Conversation so far:
who came 1st 2nd 3rd and 4th in grand national
Tiger Roll came in first place. Magic of Light came in second place. Rathvinden came in third place. Walk in the Mill came in fourth place.
who was the first place rider with Tiger Roll in the grand national
Tiger Roll was ridden by Davy Russell.

Question: who won in 2018
Self-contained rewrite: who won the grand national in 2018