Add punctuation: Since March 1917 when the roaring torrents of workmen and soldiers beating upon the Tauride Palace compelled the reluctant Imperial Duma to assume the supreme power in Russia it was the masses of the people workers soldiers and peasants which forced every change in the course of the Revolution
A: Since March, 1917, when the roaring torrents of workmen and soldiers beating upon the Tauride Palace compelled the reluctant Imperial Duma to assume the supreme power in Russia, it was the masses of the people, workers, soldiers and peasants, which forced every change in the course of the Revolution.

Add punctuation: The Userfriendly interface makes the PDF Converter extremely easy to use
A: The User-friendly interface makes the PDF Converter extremely easy to use.

Add punctuation: Kaj Engmann Larsen has for 25 years in 1983 hired out periscopes by The Pantomime Theatre in the Tivoli Gardens Copenhagen
A:
Kaj Engmann Larsen has for 25 years in 1983 hired out periscopes by The Pantomime Theatre in the Tivoli Gardens, Copenhagen.