Data is retrieved from 3 systems
Issue: Activation is offset. Using Teoz.
(A) Explicit activation: Same result

          ┌─┐         ┌─┐ ┌─┐ ┌─┐
          │A│         │B│ │C│ │D│
          └┬┘         └┬┘ └┬┘ └┬┘
           │ Get data  │   │   │
           │──────────────────>│
           │           │   │   │
           │   Data    │   │   │
           │< ─ ─ ─ ─ ─│─ ─│─ ─│
           │           │   │   │
           │           │   │   │