fix: output string on timbl queries to prevent crashing (#1167)

perf/bench.ts

@@ -38,9 +38,11 @@ async function main() {
   LoadedModule.FS.writeFile('data.n3', data);
   LoadedModule.FS.writeFile('query.n3', query);
 
-  const timblRdfs = [...await getTimblAndFoaf(), ...await getRdfs()];
+  const timblFoafRdfs = [...await getTimblAndFoaf(), ...await getRdfs()];
+  const timblFoafOwl2rl = [...await getTimblAndFoaf(), ...await getOwl()];
+  const timblRdfs = [...await getTimbl(), ...await getRdfs()];
   const timblOwl2rl = [...await getTimbl(), ...await getOwl()];
-
+ 
   const LoadedDeep10 = await SwiplEye({ print: () => { } });
   LoadedDeep10.FS.writeFile('data.n3', write(deepTaxonomyBenchmark10));
   const LoadedDeep50 = await SwiplEye({ print: () => { } });
@@ -83,12 +85,18 @@ async function main() {
     ).add(
       'Run deep taxonomy benchmark [100] [reasoning only]',
       () => queryOnce(LoadedDeep100, 'main', ['--nope', '--quiet', './data.n3', '--pass-only-new']),
+    ).add(
+      'Run timbl + foaf + rdfs rules',
+      deferred(() => n3reasoner(timblFoafRdfs,  undefined, { outputType: 'string' })),
+    ).add(
+      'Run timbl + foaf + owl2rl rules',
+      deferred(() => n3reasoner(timblFoafOwl2rl, undefined, { outputType: 'string' })),
     ).add(
       'Run timbl + rdfs rules',
-      deferred(() => n3reasoner(timblRdfs)),
+      deferred(() => n3reasoner(timblRdfs,  undefined, { outputType: 'string' })),
     ).add(
       'Run timbl + owl2rl rules',
-      deferred(() => n3reasoner(timblOwl2rl)),
+      deferred(() => n3reasoner(timblOwl2rl, undefined, { outputType: 'string' })),
     ).on('cycle', (event: Event) => {
       console.log(event.target.toString());
     }).run();