I want to know the answer to the following question:
Who sued Apple, Samsung Electronics and Sandisk in 2007?
All the background I'm provided with is that "In February 2007, Texas MP3 Technologies sued Apple, Samsung Electronics and Sandisk in eastern Texas federal court, claiming infringement of a portable MP3 player patent that Texas MP3 said it had been assigned.". Is that enough to answer the question?
Answer: yes