thats not a yale. see that screw in the side of the door thats roughly in line with the bottom of the lock (one above the bottom screw in the pic), you undo that screw. then put the key in and turn the lock while pulling a little and it will come straight out providing it's the type with a key hole inside and out. if its the type with a knob on the inside, there's probably a little allen key or screw in the nob which also needs to be removed before the lock will pull out
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