Complex sentence: Nairn emigrated from Glasgow to Dunedin for his health in 1890, and moved to Wellington in 1891, where he lectured on art, and was the first teacher to conduct classes for the study of the nude figure.
Split into simpler sentences: Nairn emigrated from Glasgow to Dunedin for his health in 1890. He moved to Wellington in 1891, where he lectured on art and conducted classes for the study of the nude figure.