F1 quiz: what do all the answers have in common?

May be...

Most of the answers have already been given but I'll take a punt on the link. Not one of them won a Grand Prix? At least they don't seem to stick out as having won.

1. Who was the first driver to qualify a Minardi for a GP?
2. Who was the last driver to be entered as a third RACE driver by Williams? (at the race in question, the team's second driver actually failed to qualify, so only 2 Williams started anyway...)
3. Who replaced Francois Hesnault at Brabham in 1985?
4. Who was the second Japanese driver to set a fastest lap?
5. Who was the 53rd driver to score points on his debut? He later was one of the 4 drivers who rescued Niki Lauda at the NГјrburgring. (67 drivers have scored points on debut...Vettel at Indy last year is the most recent.)
6. Who replaced Allen Berg for commercial reasons during the 1986 Italian GP?

Some easy, some hard...what do the drivers above have in common?

Progress so far:

1. PierLuigi Martini - Germany 1985
2. Jonathon Palmer - Euro GP 1983
3. Marc Surer - Canada 1983
4. Satoru Nakajima - Australian GP 1989
5. Arturo Merzario 1972 British GP
6. Alex Caffi - Osella-Alfa Romeo (Italian)

Link ?

don't care.