21.   Three separate steel-mat walls have been erected near the freeway attempting to prevent such mass crossings.

22.   Walls are erected to block sound waves from pounding on nearby eardrums.

23.   A protective wall was erected around the building after the January bombing.

24.   A wall is being erected between the two parts of the pub.

25.   He also proposed erecting stone walls to set the restaurant apart from the memorial.

26.   Israel, he argues, should start erecting walls along a self-defined border in the West Bank and place sharp restrictions on the number of Palestinians entering Israel.

27.   She has tried to get a commemorative wall erected for the Jonestown victims.

28.   The workers earn their living by erecting sand walls to trap sea water, and collecting salt for sale after the water evaporates.

29.   Walls were erected at the entrances and guards prevented inmates from going beyond its limits.

30.   The walls are erected directly on the bare earth with no foundations, while the roof is often sealed with asphalt and has few timber or metal beams.