Translation:My sister's shoulders, back and knees are very strong, because she is a skilled dancer.
Um... just now I had this sentence to translate using a pool of words to choose from, but the whole sentence was already translated (instead of partially translated).
There were no words for me to select, so I just submitted having done nothing, and I got the question right.
Is this an error, or is Duolingo just giving me a freebie?
I had seen this presolved sentences before (though mine let me input the last two words). The only thing I could think of for this one is that Duo is teaching how the sentence is structured for when there's more than one thing listed as someone's possession.
"A, B, kaj C de fratino" Vs. "Sister's A, B, and C"