Complex sentence: These studies have shown that Wikipedia is not less accurate than other traditional encyclopedias; instead, "the few systematic studies comparing quality of content between Wikipedia and professionally produced encyclopedias, Wikipedia is found to be comparable in quality".
Split into simpler sentences: These studies have shown that Wikipedia is not less accurate than other traditional encyclopedias. "In the few systematic studies comparing quality of content between Wikipedia and professionally produced encyclopedias, Wikipedia is found to be comparable in quality".