In this task, you're given a sentence and your task is to generate a simplified sentence that focuses on lexical paraphrasing from the original sentence given in the input.

together they had 18 children , of whom 11 survived to adulthood.
together , they had eighteen children , although only eleven lived to become adults.

the spacecraft consists of two main elements : the nasa cassini orbiter , named after the italian-french astronomer giovanni domenico cassini , and the esa huygens probe , named after the dutch astronomer , mathematician and physicist christiaan huygens.
the spaceship is made of the nasa cassini orbiter , named after giovanni cassini , and the esa huygens probe , named after christiaan huygens.

the civil aviation authority -lrb- caa -rrb- is the public corporation which oversees and regulates all aspects of aviation in the united kingdom.

the civil aviation authority -lrb- caa -rrb- is the public corporation that oversees and regulates all aspects of aviation in the united kingdom.