Question:
S1: Samuel Waksal , ImClone 's former CEO , recently began serving a prison sentence of more than seven years for securities fraud .
S2: Waksal , who pleaded guilty to securities fraud charges , recently began serving a prison sentence of more than seven years .
Are S1 and S2 the same?
Answer:
yes

Question:
S1: A Trillian representative did not return an e-mail requesting comment .
S2: The representative did not return calls seeking additional comment .
Are S1 and S2 the same?
Answer:
yes

Question:
S1: The technology-laced Nasdaq Composite Index < .IXIC > tacked on 5.91 points , or 0.29 percent , to 2,053.27 .
S2: The technology-focused Nasdaq Composite Index < .IXIC > advanced 6 points , or 0.30 percent , to 2,053 , erasing earlier losses .
Are S1 and S2 the same?
Answer:
no

Question:
S1: Only 12 of the last 30 attempts to reach Mars have succeeded ( two are in transit ) .
S2: Of about 30 attempts to reach Mars , only 12 missions have succeeded .
Are S1 and S2 the same?
Answer:
no