Urgent Help

i have one file containing hundreds of record as below wanted to extract records only for 04th aug onwards, means 20140804 onwards .

here need to filter data by 04th column9containing date) by sed or awk or any other utility.

ABC BV 00147 20140730 007 000 ? ?
PQR QH 00147 20140731 008 000 ? ?
GBL LM 00147 20140801 009 000 ? ?
XYZ NT 00147 20140802 010 000 ? ?
VRL 00147 20140803 011 000 ? ?
PQG ZS 00147 20140804 012 000 ? ?
CVM LB 00147 20140805 013 000 ? ?
BUL GM 00147 20140806 014 000 ? ?
PWL PC 00147 20140807 015 000 ? ?

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