Given the task definition and input, reply with output. 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.

stands were eventually added behind each set of goals during the 1980s and 1990s as the ground began to be modernised.
in the 1980s and 90s , as the ground began to modernize , stands were added behind sets of goals.