Who was Marcus's guest in the episode when Rufus's guest was Rory McGrath?
CREATE TABLE table_19930660_2 (marcus_guest VARCHAR, rufus_guest VARCHAR)
SELECT marcus_guest FROM table_19930660_2 WHERE rufus_guest = "Rory McGrath"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_19930660_2 (marcus_guest VARCHAR, rufus_guest VARCHAR) Question: Who was Marcus's guest in the episode when Rufus's guest was Rory McGrath? [/INST] SELECT marcus_guest FROM table_19930660_2 WHERE rufus_guest = "Rory McGrath" </s>