TCC - Getting information from a specific step in a transitions process

I have a transitions process that has multiple tasks. I am trying to use TCC to get the date at which task 15 of that transitions process was completed.

However when i try something like the below rather than just returning the Step Name and the Step End Date for the step connected to Task15 it returns that information for every Step in the transitions process.

<quer:projections>

    <quer:projection>

        <quer:field path="Process,Steps,Definition,Name"/>

    </quer:projection>

    <quer:projection>

        <quer:field path="Process,Steps,EndDate"/>

    </quer:projection>

</quer:projections>

<quer:filterings>

    <quer:filtering>

        <quer:equal>

            <quer:field path="Process,Number"/>