Complex sentence: Han and Leia take their granddaughter Allana and their droids C-3PO and R2-D2 on the journey, and as the elder Solos travel in the underground caverns of Kessel, they encounter deadly energy beings that render technology useless at close range.
Split into simpler sentences: Han and Leia take their granddaughter Allana and their droids C-3PO and R2-D2 on the journey. As the elder Solos travel in the underground caverns of Kessel, they encounter deadly energy beings that render technology useless at close range.