7869
Comprising a 126 - nucleotide 5 ' untranscribed genomic sequence and a 466 - nucleotide 5 ' noncoding cDNA sequence , the 592 - nucleotide 5 ' CpG island lacked TATA and CAAT boxes but displayed a high G + C content , was enriched for CpG dinucleotides , and contained a potential Sp1 - binding site , i . e . , features compatible with a housekeeping gene .
 GENE: Sp1 - binding site
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: Sp1 - binding site 
Answer:
 GENE: Sp1 - binding site