REMOVE

1. Litter (Trash)
2. HEYES, Tracey

WHAT

1. City squares -- England - … (2)
2. Pedestrians (2)
3. Public art -- England -- … (2)
4. Streets -- Accessories (2)

WHERE

1. ENGLAND, UK (2)
2. Sheffield, South Yorkshir … (2)

WHO

1. ASQUITH, Brian (1)
2. MORRISON, Graham (1)
3. PERRY, Richard (1)
4. not known (1)

WHEN

1. 1999 (1)
2. 2005 (1)