you must distribute your contributions under the same or compatible license as the original. https://creativecommons.org/licenses/by-sa/2.5CC BY-SA 2.5 Creative
you must distribute your contributions under the same or compatible license as the original. https://creativecommons.org/licenses/by-sa/3.0CC BY-SA 3.0 Creative
you must distribute your contributions under the same or compatible license as the original. https://creativecommons.org/licenses/by-sa/2.5CC BY-SA 2.5 Creative