REMOVE

1. Railroad trains

WHAT

1. Glass -- In architecture (7)
2. Arches (5)
3. Architecture -- 2000-2100 (4)
4. Architecture -- Belgium (4)

WHERE

1. ENGLAND, UK (5)
2. BELGIUM (4)
3. Liège, Liège (4)
4. London (3)
5. Darlington, Co. Durham (1)

WHO

1. CALATRAVA, Santiago (4)
2. GEC Mowlem Railway Group (3)
3. JOHNSON, Michael (1)
4. MACH, David (1)

WHEN

1. 2009 (4)
2. 1987 (3)
3. 1997 (1)
4. 1998 (1)