tokens: I have curl and rvm , and want to install rails 1.9.3 on my lion 1.7.4 with Xcode 4.3.2 and with developer command line tools installed .
ner_tags: O O B-Library O B-Library O O O O O B-Library B-Version O O B-Operating_System B-Version O B-Application B-Version O O B-Application I-Application I-Application I-Application O O