Hon Gerry Brownlee: Does she know why an Official Information Act (OIA) response to the National leader's office about the visit of Bee Lin Chew and Su Arn Kwek to Antarctica had redactions under section 6(a) of the Official Information Act, which is designed to prevent prejudice against New Zealand security, defence, and international relations, and, if so, what was specifically discussed with them that caused section 6(a) to be used to stop that information being released?