In this task, you are given a sentence in the Romanian language. Your job is to translate the Romanian sentence into the English language.
Example: Un bărbat pune brânză mărunțită pe o pizza.
Example solution: A man is spreading shreded cheese on a pizza.
Example explanation: In the given translation process, the tense of both sentences, quantitative measures, entity name, the polarity of the sentence remains the same.

Problem: IAEA investighează de 4 ani activitățile nucleare ale Iranului.
Solution: the iaea has been investigating iran's nuclear activities for 4 years.