[Koha] Title search in KOHA

Hi, Author results also appears when I limit my search to title only. I think it appears because KOHA indexing treats statement of responsibility as part of title. How can I edit zebra indexing to get rid of that ? Example : I searched for Shakespeare in Title but document with Shakespeare as an Auhtor also appear in the search result. Please see the link below. https://opac.kustar.ac.ae/cgi-bin/koha/opac-search.pl?idx=ti&q=shakespeare Best regards Nikesh *Nikesh Narayanan *I Systems & e-Librarian I Khalifa University of Science, Technology and Research <http://www.kustar.ac.ae/> PO Box 127788, Abu Dhabi, UAE Mobile : +971507097346