11.   Television reports said they had undertaken the tour to help develop their ability to face challenges.

12.   The eight cavers are from the Social Workers College of Zurich and had undertaken the tour to help develop their ability to face challenges.

13.   The eight vacationers are from the Social Workers College of Zurich and had undertaken the tour to help develop their ability to face challenges.

14.   From Vladivostok, he is to undertake a tour of several weeks by train before settling in Moscow, but his departure date has been kept secret.

15.   He was released unharmed three weeks later and then undertook lecture tours.

16.   The US government official is undertaking a tour of the former Soviet Union.