Complex sentence: There are 10 mens teams of 20 and one womans team consisting of 25 that tug against each other the teams in Illinois; whatever team pulls the most rope wins, and whichever state wins the most contests wins Tugfest.
Split into simpler sentences: There are 10 men's teams of 20 and one woman's team of 25, that tug against each other. The team which pulls the most rope wins, and whichever state wins the most contests wins Tugfest.