Add punctuation: Back and front piece The jacket is knitted back and forth on circular needle from mid front
A: Back and front piece: The jacket is knitted back and forth on circular needle from mid front.

Add punctuation: BCC Bergen has the pleasure of presenting the theme for this years childrens games Superworld
A: BCC Bergen has the pleasure of presenting the theme for this year's children's games: Superworld!

Add punctuation: The name of calva was derived from the field in which the game came to be played which was free of obstacles and rocks
A:
The name of calva was derived from the field in which the game came to be played, which was free of obstacles and rocks.