Task: Question Answering
Input (English): Riley has gotten a ton bigger and just ... riley . he's a talker alright and just talks and talks , but now he s started to really make sense , i mean it did before , but now it REALLY sounds like a conversation . So we decided to go out for pizza but the first place didn't sell lunch anymore so we decided to go to round table and have pizza , surprisingly , everything went really well ! So then my dad , brother , riley and i went to target and my dad decides to buy a wii with mario kart and wall - e . 
Question: Why has Riley gotten a ton bigger ?
Output (English): Because he is growing up .