one of the other texts in the manuscript bears the year 1429 (which incidentally was the year gerson died) and emile male stated that the manuscript couldn't be much younger than this. (1) kurtz informs us that champion "by a similar process" has come up with the year 1416, (2) however that is to be understood.

How would the previous sentence be correctly capitalized?
Answer: One of the other texts in the manuscript bears the year 1429 (which incidentally was the year Gerson died) and Emile Male stated that the manuscript couldn't be much younger than this. (1) Kurtz informs us that Champion "by a similar process" has come up with the year 1416, (2) however that is to be understood.
our driving wheels allow simple, efficient, low-noise and cost-effective drive design, even with problematic rolling contact drives.

How would the previous sentence be correctly capitalized?
Answer: Our driving wheels allow simple, efficient, low-noise and cost-effective drive design, even with problematic rolling contact drives.
this is not about the left or the right, conservative or liberal.

How would the previous sentence be correctly capitalized?
Answer: This is not about the left or the right, conservative or liberal.
the grid design of the streets makes it extremely easy to find your way around.

How would the previous sentence be correctly capitalized?
Answer: The grid design of the streets makes it extremely easy to find your way around.