question: there are 547 items in your cart.
Capitalize this past sentence correctly.
A: There are 547 items in your cart.

question: in 1920 mazurkiewicz and sierpinski became editors of fundamenta mathematicae and polish mathematics was flourishing.
Capitalize this past sentence correctly.
A: In 1920 Mazurkiewicz and Sierpinski became editors of Fundamenta Mathematicae and Polish mathematics was flourishing.

question: sl: did you often discuss things with him?
Capitalize this past sentence correctly.
A: SL: Did you often discuss things with him?