made robust to unknown names

parsers/people.py

@@ -263,7 +263,11 @@ def ensure_users_are_persons():
             
 def who_is_this(year, possibleid):
     expo = Expedition.objects.filter(year=year)[0]
-    personexpedition = GetPersonExpeditionNameLookup(expo)[possibleid.lower()]
+    gpel = GetPersonExpeditionNameLookup(expo)
+    if possibleid.lower() in gpel:
+        personexpedition = gpel[possibleid.lower()]
+    else:
+        raise
     if personexpedition:
         return personexpedition.person
     else: