Complex sentence: Basically people are dependent on agriculture and its relevant work, but since 1995 a group of people go for concrete work where they build up new buildings and/or cement roads around 50 km surrounding.
Split into simpler sentences: Basically people are dependent on agriculture and its relevant work. However, since 1995 a group of people go for concrete work where they build up new buildings and/or cement roads around 50 km surrounding.