Complex sentence: As a result, his performances attracted scouters from many European teams and in 1997 he was sold to Real Oviedo but the team was relegated and in the end of the season he returned to Argentina River Plate and San Lorenzo.
Split into simpler sentences: As a result, his performances attracted scouters from many European teams and in 1997 he was sold to Real Oviedo. In the end of the season he returned to Argentina River Plate and San Lorenzo.