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

Now, solve this: Munca lui Mann și HS a fost despre inele de copac.
Solution:
Mann's work and the HS was all about Tree rings.