------------------------------------------
{subsActivityBeforeActivity(a7,a7,10)}

{}

{compObjWrittenByActivityBeforeActivity(x2,a7,a20,9)}

{}

{compObjWrittenByActivityBeforeActivity(x2,a15,a7,9), compObjWrittenByActivityBeforeActivity(x2,a15,a17,19), compObjWrittenByActivityBeforeActivity(x3,a15,a11,13), compObjWrittenByActivityBeforeActivity(x19,a15,a1,22)}