Complex sentence: Diana joins Wayne's group and informs him about Steppenwolf and the Mother Boxes; the two fail to persuade Arthur Curry and Victor Stone, but manage to recruit Barry Allen into the team.
Split into simpler sentences: Diana joins Wayne's group and informs him about Steppenwolf and the Mother Boxes. The two of them fail to persuade Arthur Curry and Victor Stone, but manage to recruit Barry Allen into the team.