Bulk data api - How to get Conversation title instead of their replies

Hi,

I am new to Lithium Community.

In Bulk Api responses, I am looking for conversation.title without their replies. I can see same conversation title appear with different Visit.id, Visitor.Id and with other some changes. 

Which is the actual conversation in the response and how to filter it? 

[20] => Array
        (
            [document.id] => visits.visit-summary_SESSION_xxxxxxxxxxxxxxxxxx
            [action.duration] => 0
            [board.uid] => xxxx
            [board.title] => xxxxxxxxxxxxxxxx
            [community_app] => xxxxxxxxxxx
            [conversation.uid] => xxxxxxxxxxxxxxx
            [conversation.title] => xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
            [node.ancestor_path] => /x/x/xxx/
            [visit.id] => xxxxxxxxxxxxxxxx
            [visitor.id] => xxxxxxxxxxxxx
            [user.uid] => -x
            [user.login] => xxxxxxxxxxxxxxx
            [request.url.host] => xxxxxxxxxxxxxxxxxxxxxxx
            [request.headers.user_agent] => xxxxx
            [request.headers.referrer.url] => Array
                (
                    [0] => xxxxx
                )

            [request.headers.referrer.host] => Array
                (
                    [0] => xxxx
                )

            [request.device] => xxxx
            [event.time.ms] => xxxx
            [action.key] => visits.visit-summary
            [request.geo.city] => xxxxxxxxxxxxxxxxxxx
            [request.geo.country_code] => xxxx
            [request.geo.country] => xxxxxxxxxx
            [request.geo.geohash] => xxxxxxxxxxxxxxxxx
            [request.geo.postal] => xxxxx
            [request.geo.region] => xxxxxxxxx
            [request.geo.timezone] => -xxxxxxxxxx
            [request.geo.latitude] => xx.xxxx
            [request.geo.longitude] => -xx.xxxx
        )

 Thanks.