In a sexual assault case, in what circumstances will a defendant receive an indeterminate life sentence under the Three Strikes Act?

Defendant sought to avoid an indeterminate life sentence under the Three Strikes statutes by requesting that the court dismiss four of his strikes under People v. Superior Court (Romero) (1996) 13 Cal.4th 497 (Romero). The prosecutor opposed this motion. After denying defendant's request to strike any of his strikes, the court imposed an indeterminate sentence of 25 years to life for defendant's failure to register as a sex offender. It also imposed but then struck four one-year enhancements for prior prison terms as recommended in the probation report.