TASK DEFINITION: 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.
PROBLEM: on december 19 , 2006 , a large white plume of condensing steam was observed , leading some media people to assume there had been a small eruption.

SOLUTION: on december 19 , 2006 , a large white & dense plume of steam led some media people to take it as a small eruption.

PROBLEM: he tells the story of the holy grail , and reveals himself as lohengrin , knight of the holy grail and son of king parsifal.

SOLUTION: he tells the story of the holy grail , and shows himself as lohengrin , knight of the holy grail and son of king parsifal.

PROBLEM: proteus is very cratered , showing no sign of any geological modification.

SOLUTION:
proteus is very cratered , viewing no sign of any geological adjustme.