Complex sentence: It is named after Henri Theil and Pranab K. Sen, who published papers on this method in 1950 and 1968 respectively, and has been called "the most popular nonparametric technique for estimating a linear trend".
Split into simpler sentences: It is named after Henri Theil and Pranab K. Sen, who published papers on this method in 1950 and 1968 respectively. It has been called "the most popular nonparametric technique for estimating a linear trend".