QUESTION: Fix punctuation: Through the last couple of months Canadian sign company The Brothers Markle has installed hundreds of GuideSign panels from DanSign
ANS: Through the last couple of months, Canadian sign company The Brothers Markle has installed hundreds of GuideSign panels from DanSign.

QUESTION: Fix punctuation: Film can provide an emotional insight into certain situations that it is not possible to do even with many words
ANS: Film can provide an emotional insight into certain situations, that it is not possible to do, even with many words.

QUESTION: Fix punctuation: For this exhibition the Berliner Unterwelten eV Berlin Underworlds society has assembled years of its own findings on this subject together with the latest research available
ANS: For this exhibition, the Berliner Unterwelten e.V. (Berlin Underworlds society) has assembled years of its own findings on this subject, together with the latest research available.

QUESTION: Fix punctuation: Todays refrigerators use plastics in their insulation systems to ensure that your food and drinks stay fresher and cooler for longer whilst using less energy
ANS:
Today’s refrigerators use plastics in their insulation systems to ensure that your food and drinks stay fresher and cooler for longer whilst using less energy!