added link

README.md

@@ -39,8 +39,8 @@ Each zip file contains a folder of trajectories. Each trajectory is saved as a .
   - `object_info` (Single-Object only): a dictionary containing information of the object being manipulated in the current trajectory with the following keys-value pairs:
     - `length`: length of the object (S=Short, L=Long)
     - `size`: cross-sectional size of the object (S=Small, M=Medium, L=Large)
-    - `shape`: shape ID of the object according to reference sheet
-    - `color`: color ID of the object according to reference sheet
+    - `shape`: shape ID of the object according to [reference](https://functional-manipulation-benchmark.github.io/static/doc/FMB%20Shape%20and%20Color%20Number%20Reference%20Sheet%20-%20Google%20Docs.pdf) sheet
+    - `color`: color ID of the object according to [reference](https://functional-manipulation-benchmark.github.io/static/doc/FMB%20Shape%20and%20Color%20Number%20Reference%20Sheet%20-%20Google%20Docs.pdf) sheet
     - `angle`: initial pose of the object indicating how it should be grasped and reoriented (horizontal, vertical)
     - `distractor`: indicator for whether there are distractor objects (y=yes, n=no)
 ## File Naming