Question: Certification of the Engcon QSC locking system has been carried out in close collaboration with the SP Technical Research Institute in Sweden
Please fix the punctuation.
Fixed: [Certification of the Engcon QSC locking system has been carried out in close collaboration with the SP Technical Research Institute in Sweden.]

Question: By 1984 the Writers Union was calling for more Sovietstyle social realism in Bulgarian literature
Please fix the punctuation.
Fixed: [By 1984 the Writers' Union was calling for more Soviet-style social realism in Bulgarian literature.]

Question: Last 10 news submissions by agykune
Please fix the punctuation.
Fixed: [Last 10 news submissions by agykune:]

Question: Quotes from testing farmers Beforehand I was a little sceptical about the energy savings with L4C but now even I am convinced
Please fix the punctuation.
Fixed:
[Quotes from testing farmers 'Beforehand, I was a little sceptical about the energy savings with L4C, but now even I am convinced.']