In this task, you are given a sentence in Polish language and its corresponding English translation. Here, your job is to output label "yes" if the translation is correct, otherwise output "no".
One example: Polish: będzie to parabola, która wygląda mniej więcej tak… wygląda jakoś tak… 
 English: this is gonna be a parabola, it looks something like this... It's gonna look something... 
Solution is here: yes
Explanation: Polish sentence is properly converted into English sentence.

Now, solve this: Polish: Muszą pracować na jego ziemi,  
 English: a way to keep score for our progress of how much we've learned. 
Solution:
no