C4C issues with data export webservice

[Former Member]

I am currently working on transfering data from C4C to another platform via webservices.
My client needs the data from all the prospect accounts within the C4C tenant including lead and opportunity data.

I have set up three communication arrangements, query accounts, query leads and query opportunities.

I can have a stream of data containing all informations on the prospects with a query on the query accounts arrangement, but if I want the data from leads and opportunities, I have to query each of them with the id of the prospect, one by one.

My client wants to have only one stream of data and I can't seem to be able to provide the lead and opportunity data embedded in the prospect data and have it done with only one query.

Is there something I am missing?

Thank you very much.