sentence: A person standing in a kitchen next to a cutting board on a kitchen counter demonstrates how to sharpen a knife. sentence:   A  man in a kitchen next to one tomato on a cutting board, slices the tomato piece in half and then turns to talk to the camera. sentence:   the man then picks up a plate, flips it over and begins to run the blade of the knife across the protruding edges at the bottom of the plate. sentence:   After doing this, the man then uses the knife to cut the tomato again, this time slicing neater and quicker, the man then smiles at the camera.