51.   The prayers, like the memorial candles, crossed religious boundaries.

52.   The problem comes where languages cross boundaries, opening the door to the threat that imports of books from an unregulated market will undermine pricing in a regulated one.

53.   These are issues which cross national boundaries because food crosses national boundaries, in huge quantities.

54.   This is a woman whose popularity crosses boundaries.

55.   Trademark law is of little help when Internet domains cross both industrial and national boundaries, and so rival claimants have tended to slog it out expensively in court.

56.   Urban sprawl has blurred the boundaries between city and country, so that now clothing also tends to cross boundaries.

57.   We are trying to coordinate group visits by minorities who must cross the boundaries between ethnic areas to go back to see their former homes.

58.   Watersheds cross political boundaries and can only be managed jointly, they said.

59.   What the critics are arguing is that newsroom cynicism has crossed the boundary between being tough and being mean.

60.   With the current surge in confessional performance art and plays, that boundary has been crossed repeatedly.