Conversation so far:
When did Eddy Merckx first compete in cycling?
In summer 1961, Eddy Merckx bought his first racing license and competed in his first official race a month after he turned sixteen, coming in sixth place.
When did Eddy Merckx win his first race?
Eddy Merckx rode in twelve more races before winning his first, at Petit-Enghien, on 1 October 1961.
Who was Eddy Merckx's coach initially?
In the winter following his first amateur victory on 1 October 1961, Eddy Merckx trained with former racer Félicien Vervaecke at the local velodrome.
When did Eddy Merckx start competing professionally?
Eddy Merckx turned professional on 29 April 1965 when he signed with Rik Van Looy's Belgian team, Solo–Superia.

Question: What were his parents' occupations?
Self-contained rewrite: What were Eddy Merckx's parents' occupations?