In this task, given a sentence in the Chinese language, your task is to convert it into the English language.

大卫·韦克菲尔德中校是特遣部队赫尔曼德的发言人。
Lieutenant Colonel David Wakefield is the spokesperson for Task Force Helmand.

反对者宣称封锁和建筑工作是故意阻止穆斯林进入圣地的行为。
Opponents have declared the blockades and the construction work a deliberate act to prevent Muslims from accessing the holy site.

这段旅程通常需要五十分钟，而且飞机上的燃料只够三小时三十分钟。

The journey normally takes fifty minutes and only three hours and thirty minutes worth of fuel was on board.