context: She started throwing at the age of 12 and at 13 threw 37m58cm to win the English Schools Championships.
source: At the age of 16 Holroyd threw 52m50 and became a senior international athlete.
reference_original: A los 16 años Holroyd lanzó hasta 52 m 50 cm y la hicieron una atleta internacional sénior.
reference_flipped: A los 16 años Holroyd lanzó hasta 52 m 50 cm y lo hicieron un atleta internacional sénior.