\set ECHO none
remove_provenance

(1 row)
name|city|banzhaf
Ellen|Berlin|0.211
Susan|Berlin|0.737
John|New York|0.176
Paul|New York|0.396
Dave|Paris|-0.039
Magdalen|Paris|0.065
Nancy|Paris|0.157
(7 rows)
remove_provenance

(1 row)
name|city|banzhaf
Ellen|Berlin|0.000
Susan|Berlin|0.000
John|New York|0.000
Paul|New York|0.000
Dave|Paris|-4.000
Magdalen|Paris|-4.000
Nancy|Paris|-4.000
(7 rows)
remove_provenance

(1 row)
city|banzhaf
Berlin|0.120
Berlin|0.420
New York|0.080
New York|0.180
Paris|-0.030
Paris|0.050
Paris|0.120
(7 rows)