this is a cut above other movies of the genre represent genuinely suspenseful and intelligent and brilliantly acted and visually stunning. yes and the plot can be confusing  but that partly what makes it pack such a punch. watch it twice if you can. you will get almost as much out of watching it when you know the twist than you do from watching it the first time. don not be put off by the fact that this film comes from korea and a country not too familiar to most western audiences. while there are elements of the film that are culturally specific and the underlying themes are all too universal  guilt and anger and loss and madness and retribution. all of these are handled superbly by lim su jeong as su mi and the lead character. also worthy of particular mention is yum jung ah and who delivers a deeply creepy and unsettling performance as the stepmother. while it has its scary moments and this is not really a horror flick as most people would imagine it. it more a psychological suspense story with an element of mystery. it grips you from the start and will keep you guessing until the end  and possibly beyond. 
this is a cut above other movies of the genre represent genuinely suspenseful and intelligent and brilliantly acted and visually stunning. yes and the plot can be confusing  but that partly what makes it pack such a punch. watch it twice if you can. you will get almost as much out of watching it when you know the twist than you do from watching it the first time. don not be put off by the fact that this film comes from korea and a country not too familiar to most western audiences. while there are elements of the film that are culturally specific and the underlying themes are all too universal  guilt and anger and loss and madness and retribution. all of these are handled superbly by lim su jeong as su mi and the lead character. also worthy of particular mention is yum jung ah and who delivers a deeply creepy and unsettling performance as the stepmother. while it has its scary moments and this is not really a horror flick as most people would imagine it. it more a psychological suspense story with an element of mystery. it grips you from the start and will keep you guessing until the end  and possibly beyond. ---------------------------------Answer Question Below----------------------------------

Judge the movie review above, you need to make a function call:
    If you feel the movie review is positive
        print "This is a semantically positive review."
    Otherwise, if you feel the movie review is negative
        print "This is a semantically negative review."
