Write a question about the following article: The "tale of two halves" sports clich&#233; was never more true to life as it was Sunday October 1 in AT&T Stadium, as the Dallas Cowboys lost to the visiting Los Angeles Rams 35-30 after dominating the first half of play. Dallas was in the driver's seat and looked ready to demolish the young Rams and their rookie head coach after a workmanlike, dominating first half that saw Dallas post three touchdowns after long-distance drives and hold a 24-16 halftime lead. The second half saw Dallas' offense virtually grind to a halt while Los Angeles slowly chipped away at the lead, finally finding themselves ahead to stay after Todd Gurley's 53-yard catch-and-run put L.A. up 26-24 late in the third quarter. After Dallas posted a 4th-quarter TD on a pass to TE James Hanna, L.A. was able to answer with its 7th field goal of the game. With the score 35-30, a late Dallas rally failed, and the Cowboys found themselves 2-2 with a looming meeting at home vs. the Green Bay Packers October 8.

Question about the article:
How many points behind were the Rams at halftime?