In general, in Sranan, functions such as subject and object, which are high on the Noun Phrase Accessibility Hierarchy (Keenan & Comrie 1977) lend themselves more readily to the type of relativization that leaves a gap at the site of the relativized noun. When the relativized element has a function lower on the scale, Sranan requires that a resumptive pronoun occupy the original position of the element. (See Winford 2008: 42)
Source: Winford 2008: 42