Original sentence: Gravitomagnetic forces produced by the Lense-Thirring effect (frame dragging) within the ergosphere of rotating black holes combined with the energy extraction mechanism by Sir Roger Penrose have been used to explain the observed properties of relativistic jets.Relativistic jets may provide evidence for the reality of frame-dragging.The gravitomagnetic model developed by Reva Kay Williams predicts the observed high energy particles (~GeV) emitted by quasars and active galactic nuclei; the extraction of X-ray and γ-ray photons; the collimated jets about the polar axis; and the asymmetrical formation of jets (relative to the orbital plane)
Edited sentence: Gravitomagnetic forces produced by the  Lense-Thirring effect (frame dragging) within the ergosphere of rotating black holes combined with the energy extraction mechanism by Sir Roger Penrose have provided the best explanations for the observed properties of relativistic jets.Relativistic jets dramatically evince the reality of frame dragging phenomena predicted by applications of general relativity theory.The gravitomagnetic model developed by Reva Kay Williams accounted for the observed high energy particles (~GeV) emitted by quasars and active galactic nuclei; the extraction of X-ray and γ-ray photons; the collimated jets about the polar axis; and the asymmetrical formation of jets (relative to the orbital plane).Those properties have not been adequately described by magnetohydrodynamics