Breakdown of sore ha watasitati no aida no ookina mondai datta.
はha
topic particle
それsore
that (one) pronoun
のno
possessive case particle
大きいookii
big, large
Nihon-shiki romanizationwatasi ha tyuugoku kara kimasita
Hepburn romanizationwatashi wa chuugoku kara kimashita
