Complex sentence: At home Robert and Penny's (Maria Doyle Kennedy) marriage is falling apart, while Raphina and Cosmo's relationship blossoms, leading to Cosmo taking her out to Dalkey Island in his granddad's motor cruiser.
Split into simpler sentences: At home Robert and Penny (Maria Doyle Kennedy) 's marriage is falling apart, while Raphina and Cosmo's relationship blossoms. Cosmo takes Raphina out to Dalkey Island in his granddad's motor cruiser.