Complex sentence: They are taken to the great pit of Carkoon, the Sarlacc's nesting ground, where Luke frees himself with R2-D2's help and battles Jabba's guards with his new constructed lightsaber.
Split into simpler sentences: They are taken to the Great Pit of Carkoon, the Sarlacc's nesting ground. Luke, with R2-D2's help, frees himself and battles Jabba's guards with his new constructed lightsaber.