What is the sequencer when ion torrent pgm is 200-400 bp?
CREATE TABLE table_17773 (
    "Sequencer" text,
    "Ion Torrent PGM" text,
    "454 GS FLX" text,
    "HiSeq 2000" text,
    "SOLiDv4" text,
    "PacBio" text,
    "Sanger 3730xl" text
)
SELECT "Sequencer" FROM table_17773 WHERE "Ion Torrent PGM" = '200-400 bp'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the sequencer when ion torrent pgm is 200-400 bp? ### Input: CREATE TABLE table_17773 (
    "Sequencer" text,
    "Ion Torrent PGM" text,
    "454 GS FLX" text,
    "HiSeq 2000" text,
    "SOLiDv4" text,
    "PacBio" text,
    "Sanger 3730xl" text
) ### Response: SELECT "Sequencer" FROM table_17773 WHERE "Ion Torrent PGM" = '200-400 bp'