Does the following execution satisfy sequential consistency? If not, remove one operation so that the execution satisfies sequential consistency.

I understand that sequential consistency requires an execution to be valid and preserve per-node order, but am struggling to apply it to this execution. Particularly confused about what 1 = R(x) means. My intuition is that it is sequentially consistent because we don't care about real-time order meaning it could execute W(x,1), 1 = R(x), W(x,2), W(x,3). However, a little iffy about the W(x,2) and W(x,3). Any help or guidance is appreciated!

w(x,3) P. P, w(x,3) P. P