1.   Despite the adoption of a global data-structure, an essentially hierarchical flow of information is imposed which allows for a weak interaction between the knowledge sources.

2.   According to testimony at his trial, Kiszczak signed a coded message the day martial law was imposed allowing riot police to fire at protesters.

3.   Mokhchayev said the restrictions had been imposed to allow Russian forces to clear Grozny of mines planted by rebels.

4.   The moratorium was imposed to allow a panel of independent scientists to review government data and try to resolve questions about the size of the population.