Input: Read this: Bitumen was used in early photographic technology. In 1826 or 1827, it was used by French scientist Joseph Nicéphore Niépce to make the oldest surviving photograph from nature. The bitumen was thinly coated onto a pewter plate which was then exposed in a camera. Exposure to light hardened the bitumen and made it insoluble, so that when it was subsequently rinsed with a solvent only the sufficiently light-struck areas remained. Many hours of exposure in the camera were required, making bitumen impractical for ordinary photography, but from the 1850s to the 1920s it was in common use as a photoresist in the production of printing plates for various photomechanical printing processes.[not in citation given]
Question: When did the Spanish scientist use bitumen to make a photograph from nature?

Output: unanswerable


Input: Read this: Green shored up the 1984 roster with a series of transactions. In December, 1983 Scott Sanderson was acquired from Montreal in a three-team deal with San Diego for Carmelo Martínez. Pinch hitter Richie Hebner (.333 BA in 1984) was signed as a free-agent. In spring training, moves continued: LF Gary Matthews and CF Bobby Dernier came from Philadelphia on March 26, for Bill Campbell and a minor leaguer. Reliever Tim Stoddard (10–6 3.82, 7 saves) was acquired the same day for a minor leaguer; veteran pitcher Ferguson Jenkins was released.
Question: When was Scott Sanderson acquired from Montreal?

Output: December, 1983


Input: Read this: In 1993, browser software was further innovated by Marc Andreessen with the release of Mosaic, "the world's first popular browser", which made the World Wide Web system easy to use and more accessible to the average person. Andreesen's browser sparked the internet boom of the 1990s. The introduction of Mosaic in 1993 – one of the first graphical web browsers – led to an explosion in web use. Andreessen, the leader of the Mosaic team at National Center for Supercomputing Applications (NCSA), soon started his own company, named Netscape, and released the Mosaic-influenced Netscape Navigator in 1994, which quickly became the world's most popular browser, accounting for 90% of all web use at its peak (see usage share of web browsers).
Question: Who released Mosaic?

Output: Marc Andreessen


Input: Read this: The San Diego Symphony at Symphony Towers performs on a regular basis and is directed by Jahja Ling. The San Diego Opera at Civic Center Plaza, directed by Ian Campbell, was ranked by Opera America as one of the top 10 opera companies in the United States. Old Globe Theatre at Balboa Park produces about 15 plays and musicals annually. The La Jolla Playhouse at UCSD is directed by Christopher Ashley. Both the Old Globe Theatre and the La Jolla Playhouse have produced the world premieres of plays and musicals that have gone on to win Tony Awards or nominations on Broadway. The Joan B. Kroc Theatre at Kroc Center's Performing Arts Center is a 600-seat state-of-the-art theatre that hosts music, dance, and theatre performances. The San Diego Repertory Theatre at the Lyceum Theatres in Horton Plaza produces a variety of plays and musicals. Hundreds of movies and a dozen TV shows have been filmed in San Diego, a tradition going back as far as 1898.
Question: Which theater is unknown for hosting a variety of musicals and plays?

Output:
unanswerable