Please capitalize where necessary: fabrikant : u, k, wzf organisation
A: Fabrikant : U, K, WZF Organisation

Please capitalize where necessary: as a child and teenager they were very frequent.
A: As a child and teenager they were very frequent.

Please capitalize where necessary: only one thought is going around my head: i hope there won't be a prayer meeting afterwards.
A: Only one thought is going around my head: I hope there won't be a prayer meeting afterwards.

Please capitalize where necessary: (not yet available in english) a collection of posthumous, unfinished manuscripts by martinus from the 1970s until his death in 1981 when he was preparing the first publication of his works under the common title the third testament.
A:
(Not yet available in English) A collection of posthumous, unfinished manuscripts by Martinus from the 1970s until his death in 1981 when he was preparing the first publication of his works under the common title The Third Testament.