In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.

Ex Input:
 Free protein S deficiency in acute ischemic stroke .

Ex Output:
protein S


Ex Input:
 Regulation of the human stress response gene GADD153 expression : role of ETS1 and FLI - 1 gene products .

Ex Output:
FLI - 1


Ex Input:
 The classic sterol regulatory cis element ( sre - 1 ) in the LDL receptor promoter mediates sterol regulatory element binding protein ( SREBP ) - binding and the effects of insulin and platelet derived growth factor ( PDGF ) .

Ex Output:

LDL receptor