What are the keywords in the following sentence? italian comune is one the most world visited city by tourists every year .
city, tourist, visit, world

What are the keywords in the following sentence? football player leaves the pitch during the match .
leave, match, pitch, player

What are the keywords in the following sentence? Man chisels on stone to create a sculpture.
chisel, sculpture, stone

What are the keywords in the following sentence? some of our team members participating in contest
contest, member, participate