Before revision:  We just did that for the S \& P 500 companies in the U.S., and did so by leveraging a dataset of 440K company reviews published during twelve successive years, and developing a state-of-the-art deep-learning framework to accurately extract stress mentions from these reviews.
After revision:  We just did that for the S P 500 companies in the U.S., and did so by leveraging a dataset of 440K company reviews published during twelve successive years, and developing a state-of-the-art deep-learning framework to accurately extract stress mentions from these reviews.