Update 1.get-subgraph.md (#1957)

docs-2.0/3.ngql-guide/16.subgraph-and-path/1.get-subgraph.md

@@ -109,6 +109,20 @@ nebula> INSERT EDGE serve(start_year, end_year) VALUES "player101" -> "team204":
     The returned subgraph is as follows.
 
     ![GET SUBGRAPH FROM "101" OUT serve](https://docs-cdn.nebula-graph.com.cn/figures/subgraph-2-22-5-7.png)
+
+ * This example goes two steps from the vertex `player101` over `follow` edges, filters by degree > 90 and age > 30, and shows the properties of edges.
+
+    ```ngql
+    nebula> GET SUBGRAPH WITH PROP 2 STEPS FROM "player101" \
+        WHERE follow.degree > 90 AND $$.player.age > 30 \
+        YIELD VERTICES AS nodes, EDGES AS relationships;
+    +-------------------------------------------------------+------------------------------------------------------+
+    | nodes                                                 | relationships                                        |
+    +-------------------------------------------------------+------------------------------------------------------+
+    | [("player101" :player{age: 36, name: "Tony Parker"})] | [[:follow "player101"->"player100" @0 {degree: 95}]] |
+    | [("player100" :player{age: 42, name: "Tim Duncan"})]  | []                                                   |
+    +-------------------------------------------------------+------------------------------------------------------+
+    ```
 
 ## FAQ