###HUMAN: who is the constructor when the tyre is d, the engine is talbot 23cv 4.5 l6, the chassis is talbot-lago t26c and the entrant is ecurie belge?, ###ASSISTANT: SELECT "Constructor" FROM table_54042 WHERE "Tyre" = 'd' AND "Engine" = 'talbot 23cv 4.5 l6' AND "Chassis" = 'talbot-lago t26c' AND "Entrant" = 'ecurie belge'