Complex sentence: MGM failed to provide her with a quality follow up role to enable her to build on her growing popularity, and by 1953 she had joined the cast of the television sitcom "Make Room for Daddy".
Split into simpler sentences: MGM failed to provide her with a quality follow up role to enable her to build on her growing popularity. By 1953, she had joined the cast of the television sitcom "Make Room for Daddy".