Some of the emails had the subject line, "Think Twice." They were sent from a spoofed email address. The sender claimed to have had an associate plant a small bomb in the recipient's building and said the only way to stop him from setting it off was by making an online payment of $20,000 in bitcoin.
Some of the emails had the subject line, "Think 1+1." They were sent from a spoofed email address.
Twice=2, 1+1=2, giving it the same meaning.
( z1 and :op ( z2 have :ARG0 ( z3 email :quant ( z4 some ) :ARG1-of ( z5 include :ARG2 ( z6 email ) ) ) :ARG1 ( z7 line :mod ( z8 subject ) :mod ( z9 think :ARG1 ( z10 product :name ( z11 name :op "Think" :op "1+1" ) ) ) ) ) :op ( z12 send :ARG1 z6 :ARG2 ( z13 address :mod ( z14 email ) :ARG1-of ( z15 spoof ) ) ) )