Task: Explanation
Input (English): The BMW F30/F31/F34/F35 series is the sixth generation of the BMW 3 Series range of entry-level luxury cars. It was launched in late 2011 as the successor to the E90 3 Series. The body styles of the sixth generation 3 Series range are: Question: Between the BMW 3 series and BMW 4 series, which year was the earlier one released? Answer: 2011
Output (English):  It was launched in late 2011 as the successor to the E90 3 Series.