With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Idris Elba was in Star Trek Beyond.
text_B: The Northern Hemisphere is the half of Earth that is north of the equator .. Earth. Earth. north. north. equator. equator. For other planets in the Solar System , north is defined as being in the same celestial hemisphere relative to the invariable plane of the solar system as Earth 's North pole .. Earth. Earth. north. north. Solar System. Solar System. invariable plane. invariable plane. Due to the Earth 's axial tilt , winter in the Northern Hemisphere lasts from the December solstice -LRB- typically December 21 UTC -RRB- to the March Equinox -LRB- typically March 20 UTC -RRB- , while summer lasts from the June solstice -LRB- typically June 21 UTC -RRB- through to the September equinox -LRB- typically September 23 UTC -RRB- .. Earth. Earth. axial tilt. axial tilt. winter. winter. December solstice. Solstice. March Equinox. March Equinox. summer. summer. June solstice. solstice. September equinox. Equinox. The dates vary each year due to the difference between the calendar year and the astronomical year .. calendar year. calendar year. astronomical year. Year#Astronomical years. Its surface is 60.7 % water , compared with 80.9 % water in the case of the Southern Hemisphere , and it contains 67.3 % of Earth 's land .. Earth. Earth. Southern Hemisphere. Southern Hemisphere
not_related.