A number of studies have attempted to distinguish these possibilities, with mixed results.

The album features a number of creative aspects not yet attempted by the band.

A number of theories have attempted to explain this link.

A large number of empirical studies have attempted to confirm this link.

However, a number of other experiments attempted to duplicate their results and were unable to do so.

A small number of the audience attempted to reason with the demonstrators.

The late 1990s saw a number of companies attempt to develop products for near-eye and projection.

A number of men attempted to stand their ground against the attackers, but they were soon defeated and killed.

By the 1800's, a number of European nations were attempting to colonize the area.

A telephone company can experience problems when large numbers of callers attempt to use the system at the same time.