وقتي از سرايداراني كه معرفي كردم مي پرسيد كه يادگيري شغل آنها چقدردشوار است مي گويند: اين كار مستلزم بدست آوردن تجربه زيادي است. 
When you ask the janitors who behaved like the ones I described how hard it is to learn to do their job, they tell you that it takes lots of experience. 