template: ### Instruction: Rewrite this English sentence to give a better translation.
  
  ### English: What I had was a very particular set of engineering skills, skills I'd acquired over my career (Laughter) that were new to people who had been working on the air pollution problem for so many years.
  ### English rewrite: I had a very specific set of engineering skills, which I had acquired over my career (laughter) and which were new to people who had been working on the air pollution problem for so many years.