Colombia has called out the army and imposed emergency measures. [VERB PREP. noun]

哥伦比亚出动了军队,并采取了紧急措施。

I called the doctor out. [VERB noun PREP.]

我叫了医生。

The fire brigade should always be called out to a house fire. [be V-ed P + to]

一旦房屋失火,就应该马上叫消防队来。