Please capitalize where necessary: is a provitamin which participate in numerous processes that are essential for the body.
A: Is a provitamin which participate in numerous processes that are essential for the body.

Please capitalize where necessary: squeeze the lemon over the dish and sprinkle with salt and pepper.
A: Squeeze the lemon over the dish and sprinkle with salt and pepper.

Please capitalize where necessary: the final one, in june 1950, was the last ever execution on danish soil. the concrete floor and drain are still visible.
A: The final one, in June 1950, was the last ever execution on Danish soil. The concrete floor and drain are still visible.

Please capitalize where necessary: the greater area of chongqing is home to some 34 million people, and is situated where the yangtze and jialing rivers meet.
A:
The greater area of Chongqing is home to some 34 million people, and is situated where the Yangtze and Jialing rivers meet.