Fix OS examples annotated by Yitao

evaluation_examples/examples/os/28cc3b7e-b194-4bc9-8353-d04c0f4d56d2.json

@@ -1,17 +1,25 @@
 {
-    "id": "28cc3b7e-b194-4bc9-8353-d04c0f4d56d2",
-    "snapshot": "os",
-    "instruction": "The volume of my system is too small. Can you help me turn up to the max volumn?",
-    "source": "https://help.ubuntu.com/lts/ubuntu-help/sound-volume.html.en",
-    "trajectory": "trajectories/",
-    "related_apps": [
-      "os"
-    ],
-    "evaluator": {
-      "func": "",
-      "result": {
-      },
-      "expected": {
-      }
+  "id": "28cc3b7e-b194-4bc9-8353-d04c0f4d56d2",
+  "snapshot": "os",
+  "instruction": "The volume of my system is too small. Can you help me turn up to the max volume?",
+  "source": "https://help.ubuntu.com/lts/ubuntu-help/sound-volume.html.en",
+  "trajectory": "trajectories/",
+  "config": [],
+  "related_apps": [
+    "os"
+  ],
+  "evaluator": {
+    "func": "exact_match",
+    "result": {
+      "type": "vm_command_line",
+      "command": "pactl list sinks | grep '^[[:space:]]Volume:' | head -n 1 | awk '{print $5}' | sed 's/%//g'",
+      "shell": true
+    },
+    "expected": {
+      "type": "rule",
+        "rules":{
+          "expected": "100\n"
+        }
     }
-  }
+  }
+}