the survival rate was higher in the group which received melatonin.

How would the previous sentence be correctly capitalized?
Answer: The survival rate was higher in the group which received melatonin.
five papers appeared in 1940, one of them a major article over 30 pages in length in the american journal of mathematics with the title infinite product measures and infinite convolutions.

How would the previous sentence be correctly capitalized?
Answer: Five papers appeared in 1940, one of them a major article over 30 pages in length in the American Journal of Mathematics with the title Infinite product measures and infinite convolutions.
a look at the youtube channel is always worthwhile.

How would the previous sentence be correctly capitalized?
Answer: A look at the YouTube channel is always worthwhile.
our system offers many little benefits.

How would the previous sentence be correctly capitalized?
Answer: Our system offers many little benefits.