Add Benjie and Query Ambiguity topic to May 2020 WG (#394)

* Add Benjie to May 2020 WG

* Add query ambiguity topic to May 2020 WG

Yes, I enjoyed writing the topic description.

Co-authored-by: Lee Byron <[email protected]>

Author: benjie

agendas/2020-05-07.md

@@ -27,7 +27,9 @@ agenda, edit this file.*
 | Name                     | Organization / Project   | Location
 | ------------------------ | ------------------------ | ------------------------
 | Lee Byron                | GraphQL Foundation       | San Francisco, CA, US
+| Benjie Gillam ✏️          | Graphile                 | Southampton, UK
 | Wojciech Trocki          | IBM/Red Hat              | Dublin
+| *ADD YOUR NAME ABOVE TO ATTEND*
 
 
 ## Agenda
@@ -57,4 +59,6 @@ Example agenda item:
 1. Review agenda (2m, Lee)
 1. Review previous meeting's action items (5m, Lee)
    - [Currently open action items](https://github.com/graphql/graphql-wg/issues?q=is%3Aissue+is%3Aopen+label%3A%22Action+item+%3Aclapper%3A%22)
+1. Query a Query query query: "query" ambiguity (10m, Benjie)
+   - [The term "query" is overloaded and can be ambiguous](https://github.com/graphql/graphql-spec/issues/715)
 1. *ADD YOUR AGENDA ABOVE*