Copyright problem removed Prior content in this article duplicated one or more previously published sources The material was copied from here here here here here here here and here Copied or closely paraphrased material has been rewritten or removed and must not be restored unless it is duly released under a compatible license For more information please see using copyrighted works from others if you are not the copyright holder of this material or donating copyrighted materials if you are For legal reasons we can not accept copyrighted text or images borrowed from other web sites or published material such additions will be deleted Contributors may use copyrighted publications as a source of information but not as a source of sentences or phrases Accordingly the material may be rewritten but only if it does not infringe on the copyright of the original or plagiarize from that source Please see our guideline on non free text for how to properly implement limited quotations of copyrighted text Wikipedia takes copyright violations very seriously and persistent violators will be blocked from editing While we appreciate contributions we must require all contributors to understand and comply with these policies Thank you