Complex sentence: The website competes with other online resource sites and encyclopedias and, for March 2014,61,428,000 unique visitors were registered by comScore for About.com, making it the 16th-most-visited online property for that month.
Split into simpler sentences: The website competes with other online resource sites and encyclopedias. By March 2014,61,428,000 unique visitors were registered by comScore for About.com, making it the 16th-most-visited online property for that month.