Programming languages:

Consider the Prolog code: male (paul). male (james). female (stella). female (linda). parents (james, paul, linda). parents(stella, paul, linda). sister_of (A, B): - female (A), female (B), \ = B parents (A, M, F), parents (B, M, F). To ask whether Stella is the sister of anyone, the appropriate query is: ? - sister_of (stella, X). Briefly trace and explain each step of what happens when Prolog executes this query