Robberies and muggings often happen in taxis because they are confined private spaces.
「タクシーは密室なのでタクシー強盗がよくおこる」= Robberies and muggings often happen in taxis because they are confined private spaces.
ボキャブラリー
robbery / mugging = 強盗
often = よく
happen = おこる
confined space / private space = 密室