"아르헨티나에서 축구를 합니다."

Translation: He plays soccer in Argentina.

[ChrisHines9]

Theres no way to know the subject of this sentence. I said "They play soccer in Argentina" and it was marked wrong.

[nleconte]

Flag those ;)

[avanade]

It seems "We play football in Argentina" is accepted thanks to many doing flagging!

[egene12k]

"They play soccer in Argentina" is also technically correct. However, if there is no apparent subject present in the sentence, you should safely use a singular subject available, because language programs will be more specific about plural forms from my experience with Duolingo and other such language learning programs.