Instruct: Classify a review into positive or negative sentiment.
Query: Good NOVA episode but it could have been better

This was a very interesting NOVA episode but it might have been even better if they had focussed more on the science of steel and a little less on actors playing Samurai at battle. That said it was very good and the scenes presenting fencers training were a good addition. Of this aspect, I particularly enjoyed the slow-motion shot of the swordsman cutting an arrow in mid-flight.