Not sure if looking at something different but I see 14 as 1L and 8 (7 evaluable at SITC) as 2L (where the response is much worse 1/7 @ SITC).
I haven't heard the company specifically say but with the way some have gone from SD to a response may be possible for some that do not get SD (and go off therapy) might in time have had a response if treated longer (or treated at a higher dose).