Complex sentence: Other researchers were working independently on similar data structures, and research on metric tree data structures blossomed in the late 1990s and included an examination by Google co-founder Sergey Brin of their use for very large databases.
Split into simpler sentences: Other researchers were working independently on similar data structures. The research on metric tree data structures blossomed in the late 1990s and included an examination by Google co-founder Sergey Brin of their use for very large databases.