It is probably the case that Brian is a frog. It is almost certain that Emily is a mouse. It is likely that Lily is yellow. It is highly likely that if either Lily is yellow, or Emily is a mouse, then Julius is a swan. Chances are about even that if either Brian is a frog, or Emily is a mouse, then Fred is in the park. There is little chance that if Lily is yellow, and Emily is a mouse, then Sandra got the football.
It is probably the case that either Fred is in the park, or Sandra got the football.
It is unlikely that either Fred is in the park, or Sandra got the football.
It is probably the case that either Fred is in the park, or Sandra got the football.
Either Fred is in the park, or Sandra got the football.