Their conversation went on.
Karera no kaiwa wa tsuzuita.
they (usually male); them
indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
to continue; to last; to go on; to continue (without a break); to be unbroken; to occur again and again; to lead to; to connect to; to adjoin; to come after; to follow; to succeed; to rank next to; to hold out; to keep; to last