lab4.md

@@ -70,7 +70,7 @@ FILTER( 9.9 < ?x && ?x < 10.1 && 11.9 < ?y && ?y < 12.1) .
 }'"
 ```
 
-You can use `ros2 service info` to get the type of the `sparql_query` service call and `ros2 interface` to access the definition of the service.
+You can use `ros2 service type` to get the type of the `sparql_query` service call and `ros2 interface` to access the definition of the service.
 
 ## Semantic sensor