Instructions: 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.
Input: this era coincided with the medieval warm period -lrb- 800 1300 -rrb- and stopped with the start of the little ice age -lrb- about 1250 1850 -rrb-.
Output:
this era began during the medieval warm period , -lrb- 800-1300 -rrb- and ended with the start of the little ice age -lrb- 1250-1850 -rrb-.