Complex sentence: Fields and Weber formed their partnership while still children, the two appeared at Bowery saloons, museums, circuses, and in 1885 made their first stage appearance at Miner's Bowery Theater, New York.
Split into simpler sentences: Fields and Weber formed their partnership while still children. The two appeared at Bowery saloons, museums, circuses, and in 1885 made their first stage appearance at Miner's Bowery Theater, New York.