question: the bolshevik faction had at that time not celebrated even its third birthday.
Capitalize this past sentence correctly.
A: The Bolshevik faction had at that time not celebrated even its third birthday.

question: third phase - the end of the spring (may-early june), the plants are painted in soft (high brightness) greens.
Capitalize this past sentence correctly.
A: Third phase - the end of the spring (May-early June), the plants are painted in soft (high brightness) greens.

question: dried potatoes, whether or not cut or sliced, but not further prepared
Capitalize this past sentence correctly.
A: Dried potatoes, whether or not cut or sliced, but not further prepared