Please capitalize where necessary: more on that soon, i’ll start with a bit of background first.
A: More on that soon, I’ll start with a bit of background first.
Q: it is a residential and commercial area in the center of barcelona and is filled with shops, restaurants and bars.

A: It is a residential and commercial area in the center of Barcelona and is filled with shops, restaurants and bars.
Q: when parliament certificate submitted names, ured pravobraniteljice napokon će biti posložen . specifically, mid-october expired mandates of two deputy of the ombudsman - pekeč knezevic and boris jacob geričić who led the office of may, when the first term expired slonjšak, to her reappointment 17. october this year.
A: When Parliament certificate submitted names, Ured pravobraniteljice napokon će biti posložen . Specifically, mid-October expired mandates of two deputy of the Ombudsman - Pekeč Knezevic and Boris Jacob Geričić who led the Office of May, when the first term expired Slonjšak, to her reappointment 17. October this year.
Problem: they nodded in agreement and wondered what the problem was. “well”, he continued, “some receipts are being copied by counterfeiters.
Can you repeat this sentence, but capitalize it?
Answer: They nodded in agreement and wondered what the problem was. “Well”, he continued, “some receipts are being copied by counterfeiters.
Text: vegan shaving brush – black fibre was added to your shopping cart.

Correct capitalization: Vegan Shaving Brush – Black Fibre was added to your shopping cart.
Q: christian leitz has earlier tried, in vain, to solve the enigma of the senmut star map (just like joachim friedrich quack, 2.oct.2001, cf. above - in his way - also have tried).
A:
Christian Leitz has earlier tried, in vain, to solve the enigma of the Senmut Star Map (just like Joachim Friedrich Quack, 2.Oct.2001, cf. above - in his way - also have tried).