id	domain	url
stem-2573	www.scirp.org	https://www.scirp.org
stem-2573	study.com	https://study.com
stem-2573	www.litcharts.com	https://www.litcharts.com
stem-2573	www.scirp.org	https://www.scirp.org
stem-2573	study.com	https://study.com