Assertion: browser's version | /r/HasProperty | written
Facets:
Source sentences:
text: Netscape 5.0 (codenamed "Gromit") was a continuation of the 4.x code, but only two pre-alpha versions were written, one based on original Communicator code (with layout engine stability and performance enhancements to the 4.0 codebase, codenamed Mariner) and another using the Gecko layout engine.