ascertain

The operation also included members of the National Guard, prompting the National Immigration Law Center to file a Freedom of Information Act to ascertain the military’s role in the operation.

However, precise membership numbers remain difficult to ascertain.

Since returning from Asia on Monday, Maddison has undergone tests in recent days to ascertain the severity of the injury.

The man gave a false name of John Lesley, but provided his actual date of birth and a mobile phone number, so the force was able to ascertain his real identity as Barclay.

When questioned he had initially given a false name of John Lesley, but provided his real telephone number and police were able to ascertain his true identity.