Specialist subjects?
You need 4 at least (if you get through to the final)
The life & inventions of:-
Eugene Stoner
Georg Luger
Hiram Henry Maxim
John Moses Browning
(Captain Placid 24/7 ball gags, brownie mix and clown porn, Thu 24 May 2012, 19:22, 1 reply, 12 years ago)

I can guess at two so enlighten me!

( sporters I’m sincerely gratitude to you, Thu 24 May 2012, 19:24, Reply)

All weapons inventors
Eugene Stoner - the inventor of the Armalite
Georg Luger - Ronseal but also had a load of patents to his name
Hiram Henry Maxim - as above
John Moses Browning - was a freelance weapon designer, the Browning Hi Power was his (of course) but so was the Colt 1911 & a shedload more.
(Captain Placid 24/7 ball gags, brownie mix and clown porn, Thu 24 May 2012, 19:37, Reply)

Do you live in Hungerford by any chance?

( Fucking hell Jeff I am not a robot, Thu 24 May 2012, 19:51, Reply)

Nope
Coventry (actually very close by but meh)
(Captain Placid 24/7 ball gags, brownie mix and clown porn, Thu 24 May 2012, 19:53, Reply)