Please capitalize where necessary: the peasantry organised themselves into the society of the friends of peasants, which supported the liberal demands, for instance, through the weekly publication "the friend of the peasantry".
A: The peasantry organised themselves into the Society of the Friends of Peasants, which supported the liberal demands, for instance, through the weekly publication "the Friend of the Peasantry".

Q: search availability 69 per night

A: Search availability 69 per night

Q: included in these papers was his introduction of the denjoy index for the points of a perfect set.
A: Included in these papers was his introduction of the Denjoy index for the points of a perfect set.

Problem: if we see that his reelection is certain, we'll show up soon afterwards.
Can you repeat this sentence, but capitalize it?
Answer: If we see that his reelection is certain, we'll show up soon afterwards.

Text: - social security number, if this is chosen by the data controller for each document send for signing to a third party.

Correct capitalization: - social security number, if this is chosen by the Data Controller for each document send for signing to a third party.

Please capitalize where necessary: 9:3 and out of the smoke came forth locusts on the earth, and power was given to them as the scorpions of the earth have power;
A:
9:3 And out of the smoke came forth locusts on the earth, and power was given to them as the scorpions of the earth have power;