notadictionary.com
慶應卒の人に「どうして慶應は駅伝にでないの？」って聞いたら
→ “When I asked someone who graduated from Keio, 'Why doesn't Keio compete in Ekiden?'”
慶應 keiō¹ = Keio (noun, proper noun - a university)
卒 sotsu = graduate (noun/short for sotsugyōsha)
の no = person / belonging to (particle indicating possession or relation)
人 hito = person (noun)
に ni = to / towards (particle indicating direction of action)
「 = [opening quotation mark] (punctuation)
どうして dō¹shite = why (interrogative adverb)
慶應 keiō¹ = Keio (noun, proper noun - the university)
は wa = topic marker particle (marks the subject/topic of the sentence)
駅伝 ekiden = Ekiden / relay race (noun)
駅 eki = station
伝 den = relay / transmission
に ni = in / at (particle indicating location or participation)
で de = by / with (particle indicating means or place of action)
ない nai = not / do not (negative form of verb nai)
の no = question particle (adds emphasis or softens the question)
」 = [closing quotation mark] (punctuation)
って tte = 'said that' / colloquial quote particle (casual way to introduce speech)
聞 ki = ask (verb stem)
い i = past tense auxiliary (indicating completed action)
たら tara = if / when (conditional particle indicating result)
