Demo of a psuedo Group by - Concatenation on a property value

{{#ask: [[Category:City]][[Located in::+]]
| mainlabel=City
| ?Located in
}}

City	Located in
Amsterdam	Netherlands
Berlin	Germany
Cologne	Germany
Frankfurt	Germany
Fresno	California
Greenwich	England
Karlsruhe	Baden-Württemberg
London	England
Munich	Germany
New York City	United States of America New York State
Paris	France
Porto	Portugal
Rome	Italy
San Diego	California United States of America
San Francisco	California
Stuttgart	Baden-Württemberg Germany
Sydney	Australia
Tokyo	Japan
Vienna	Austria
Warsaw	Poland
Würzburg	Germany

{{#ask: [[Located in::+]]
| mainlabel=City
| ?Located in
}}

City	Located in
A&O Berlin Hauptbahnhof	Berlin
Amsterdam	Netherlands
Baden-Württemberg	Germany
Belgium	Europe
Berlin	Germany
Brucewhealton	North Carolina, USA
Brussels	Belgium
California	West Coast of the United States United States of America
Coasting	Nettuno
Cologne	Germany
England	Europe United Kingdom
Externsteine	Germany
France	Europe
Frankfurt	Germany
Fresno	California
Gent	Belgium
Germany	Europe
Greenwich	England
Hamburg	Germany
Karlsruhe	Baden-Württemberg
Languedoc-Roussillon	France
London	England
MichaelZ70	Germany
Munich	Germany
Netherlands	Europe
New York City	United States of America New York State
Norway	Europe
Paris	France
Porto	Portugal
Rome	Italy
San Diego	California United States of America
San Francisco	California
Stuttgart	Baden-Württemberg Germany
Sydney	Australia
Tokyo	Japan
United Kingdom	Europe
Vienna	Austria
Warsaw	Poland
Würzburg	Germany

Hutchy68 (talk)