Hi, Jeanene. Steve is on the right track that you should start with mineral spirits and then try alcohol. If these do not work, Citristrip makes an Adhesive Romover that probably will work but might remove some of the finish from the floor. I have never tried it. You might want to do a small test area to determine if this will be a problem before you try the whole floor.
All of these products could become a safety issue. Be sure to read and follow the lable directions. They are flammable and you will want to have good ventilation and not be near sources of ignition like furnaces, water heaters and even electric fans. Be sure that you leave any rags that you use outside to dry completely before you bring them inside.