what happened, jenet yellen is bluffing

How Many Times You Guys Heard This Word DATA DEPENDENT, For Me I Heard It Since The Beginning Of 2015,When Yellen Said We Are Using Data Dependent Policy To Track US Economy And Growth, And She Decided To Hike Rate Based On US Data (( Data was not perfect but also not that bad)) ..
So, Why Yellen And Fed Decided To Cut Rate Hike Expectation..
Does All Things Done On G20 meeting, I mean Nothing Changed Since Last FOMC Meeting ..