Complex sentence: Beginning in 1986, Latvians began to organise around specific causes; one of the first successes in challenging Moscow was the stoppage of the building of hydroelectric dam on the Daugava, the main river in Latvia.
Split into simpler sentences: Beginning in 1986, Latvians began to organise around specific causes. One of the first successes in challenging Moscow was the stoppage of the building of hydroelectric dam on the Daugava, the main river in Latvia.